You see, i want to write a fantasy novel filled with Christian themes and morality aimed at an adult audience. But i fear that if i'm outed as a coomer people will not take seriously the lessons i'm trying to transmit.
Also, this novel would include some scenes of nudity, sex, extreme violence and some disturbing shit. I hope to offset that with the overall themes of hope, faith, regret and redemption. Which are well known Christian values.

what in the hell

The bible already have those theme really. And I'm 100% sure jesus was a wanker,can't forgive the sins of flesh without understanding them

It's a terrible idea.

Just to clarify, it's not related to Christianism, but it's inspired by Christian values like the ones i mentioned. The setting is another world with different cultures and religions and has its own lore. Inspired by works like the journey to the west, FAITH, and Lord of The Rings.

If I've had a nickel for every time I've seen or heard "Christianism" instead of "Christianity," I'd have three nickels, [insert rest of joke here, I'm lazy]. Anyway, there are three things I'd say you should look out for.

First, Christians, like any demographic, are not monolithic, but they will probably be a non-zero number of people who won't take you seriously if you choose to write such a novel while being interested in pornography, but some more open-minded Christians will be more accepting. Another matter is how will the violence, nudity, and sex be depicted in your novel. They're are plenty of religious writings that focus on such dark topics, such as Les Miserables, Crime and Punishment, and of course, the Bible itself on the top of my head. As long as you treat the topics with depth and seriousness instead of making it exploitive in nature, a lot of people will be interested in seeing the relationship between religion and violence and/or sex.

The second thing is just HOW in-depth do you want the work to be based on Christian theology. "Hope, faith, regret and redemption" as you mentioned are important to the core of Christianity, but these concepts are still pretty vague, and can easily be found, practiced, and encouraged in other cultures, religions, and societies. Will you setting merely explore these themes while making no overt reference to religion or will they be explicit parts of a religion within your setting? Furthermore, will your setting have it's own version of a messiah/child of (a) God/part of a blessed Trinity, or will it just be vaguely monotheistic like many Not!Christian fantasy religions in settings tend to be?

The final thing is what version of Christian religion/culture will you use for inspiration and what kind of audience you're making your setting for. There are several Christian denominations, too many, imo. For example, I myself is a Catholic Christian, so I and other Catholic Christians will probably be more interested to see a Catholic Christian-inspired culture and/or story like ones based on most of Southern Europe, Latin America, or Louisiana (where I'm from) while a Orthodox Christian may be more interested in cultures/religions inspired by Eastern Europe or North Africa.

Okay, here's the premise of my novel:

Sister Sophia Reinhard was a child when her mother fell victim to a terrible illness. She begged the gods for help. The gods, taking pity on her, cured Sophia's mother of her illness.

Feeling grateful and indebted, Sophia (who was 5 years old at the time) decided to join the Bathican Church's academy.

Sophia was at the academy for nine years, and upon graduation, she performed the rite to become an acolyte of the god Nephil.

In the world of Almaterra there are at least 9 gods who grant their powers to humans (Plus other gods who are not part of the acolyte system).

These gods are:

Nephil: God of light and the heavens, the youngest son of the god of all, Chronumbolo, and brother of the gods Ushust (god of the underworld), Matelus (god of hell), and Nerey (goddess of the ocean). Nephil grants his acolytes the ability to heal wounds and use light magic.

Sylph: Goddess of fauna and animals, she is a celestial created by Nephil, who created normal animals using mud and other special animals using precious gems. Sylph's acolytes can communicate with animals and have a familiar that can transform into the strongest version of every animal on the planet, as long as they meet it.

Esper: Goddess of the mind and dreams. She is the quartz fox created by Sylph, she grants her acolytes psychic powers.

Balvaris: God of war and heroes. He is the Ruby Leowulf (wolf with a lion's mane), his acolytes acquire enormous strength that increases with the damage received, he is married to the lunarian Selena and has a demigod son named Goltas.

Terran: Goddess of the earth and flora. She belongs to the ancient race of Lunarians, and gained immortality by being responsible for raising the continents from the sea and creating all plants. Her acolytes can control the earth (like earthbenders) and plants at will.

Zkold: God protector of the paladins. He is the golden turtle created by Sylph, he grants his acolytes the ability to create defensive barriers as well as extremely resistant bodies.

Ifrit (Epherith): Goddess of fire and fortune. Queen of the Djinn, fire spirits created involuntarily by the blood of Matelus. She grants her acolytes the ability to control fire and an instinct to find treasures.

Silen: God of winds and storms, He is the silver eagle created by Sylph, he grants his acolytes the ability to transform their arms into wings to fly and control the wind.

Alastor: God of rain and lightning. In ancient times, he was part of the Lunarian race, however, he was a victim of corruption by Ill Ishtma'ul (THE UNSPEAKABLE), but he was saved in time and kept his consciousness, however, he ended up transformed into a dragon like the other corrupted Lunarians. He grants his acolytes the ability to control electricity and the agility to make great leaps.

Upon completing the rite to become an acolyte, the god Nephil asks Sofia to receive the sacred scriptures of Mount Calypso, where the gods live, and deliver them to humanity for their salvation. However, the entrance is sealed by nine keys, each belonging to a god and located in their respective temples in the cities of Bathican, Atapza, Greta, Balvaria, Fremora, Tortena, Al-Hariq, Aeoria and Kaminari respectively.

Sofia gladly accepts this commission from the gods and embarks on a journey around the world to get the keys and go to Mount Calypso to take the sacred scriptures.

She begins her journey at the age of 16, coming of age in Bathican, but due to the magnitude of the world, several years pass between main town and main town.

Upon leaving her village, she is accompanied by several soldiers to take care of her, however, after a couple of months of travel, her caravan was ambushed by a legion of demons who end up killing the soldiers and capturing Sofia.

Matelus, who did not like Sofia, had spread the rumor that whoever ate the priestess would receive immortality, a lie, of course, but the important thing for him was the death of the young woman.

The gods did not sit back and sent a recently deceased man whose soul belonged to the earth.
Justin, who used to be a knight in medieval England, is chosen by the gods to save Sofia and protect her on her journey. The god Zkold took him in and made him his acolyte. Justin, using his new powers, faces the demons and saves Sofia.

Sofia acquires other powerful companions who would protect and save her in case she was captured by the demons, these are:

Cambyon, he is a demon, but he is an ally of the gods, and according to his word, he has helped Sofia since her first incarnation, he is the smartest of the group and immediately knew about Matelus' deception. His goal is to help Sofia and become a god, thus acquiring true immortality, since demons, born from human sin, have no soul so they do not go anywhere after dying. He can change shape, become invisible and create illusory clones, apart from the fact that he can see through illusions and is immune to telepathy.

Smolgolim, the jade pig. One day Sofia was captured by him and his entourage of animals. It was thanks to Cambyon, who managed to bring the goddess Sylph, that they were able to defeat him, seeing that Sofia had lost her steed, Sylph transformed Smolgolim into a giant green boar that Sofia could ride to go faster, very useful, although now they have to deal with his bad temper.

Goltas, the Barbarian. Son of the god of war, Balvaris, and the Lunarian Selena. He is a well-known hero in the world of Almaterra due to his exploits defeating powerful demons, however, one day he fell in love with a powerful ice demon named Grifrost with whom he had 3 children, Aaron, Yeti and Fierel. They all lived happily, however, one day he received a letter requesting his support on the battlefield, Balvaria, Goltas' hometown and where the temple of Balvaris is located, was at war with Fremora and Tortena to take control of the territory of Endoria and needed Goltas' help. He goes to war with Aaron and they spend several years on the battlefield, however, little by little Goltas' heart darkened, making more and more excuses to continue fighting. As punishment, the gods sent the specter Maristyr, guardian of the hell of violence and adopted son of Matelus. The plan was to kill Goltas, but instead Maristyr possessed him and used him to kill his children and his wife Grifrost, the only one who survived was his daughter Yeti, who used her power to seal him in an ice tomb.

A century passed since then and Yeti continues to take care of his father's prison until Sofia and company found him, after a battle, Goltas was released from his prison, but he was still possessed by Maristyr. The only way to help him was a magical shackle created by Selena herself that would seal the demigod's immense power, but give Goltas back control. Goltas teams up with Sofia to get the gods to agree to get Maristyr out of him and get redemption for killing his family. As a demigod and son of the war god Balvaris, Goltas boasts tremendous strength, making him capable of fighting hand to hand with demons, however, he is not as strong as he used to be due to the sealing shackles, despite that, he is still stronger than the average human, even among Balvaris' acolytes. He has the ability to use magic from his mother, but never bothered to learn spells as he prefers hand to hand combat.

And lastly, Wizaron, son of Azanon and Winora, and younger brother of Azaroth, he is a member of the ancient race of Lunarians. He was locked away in the Ushesta (the underworld) for trying to obtain the tomes of spectral magic from the god Ushust.

Wizaron has been locked away for much longer than one can imagine, so much so that he was spared from several world-changing events.

Sofia had fallen ill with what was supposed to be a simple cold, but ended up being a curse. Justin, Cambyon, and Goltas sought out doctors who could cure Sofia, but none could help her.

Turning to the gods, they said that due to the complexity of the curse, they would not be able to do much. It was the wise Maduin who suggested the help of Wizaron, a prodigy of magic even among the Lunarians.

Ushust agreed to temporarily release Wizaron to treat Sofia and once he did, he was to return to the Ushesta. But Wizaron was clever and left a part of his essence in a clay doll, transforming it into an exact copy of Wizaron himself that would act as an avatar of the wizard, sharing a single mind and powers, albeit quite limited. This avatar would join Sofia on the condition that Wizaron would be released from his prison at the end of the journey.

Wizaron is a sorcerer of great wisdom, although eccentric and grumpy with very little social experience, even among the Lunarians since he preferred to stay in his study to read books and experiment with magic formulas. Although, despite his vast knowledge of the ancient world, magic and the various types of spirits that exist, he has a problem with the new status quo of the world, especially when it comes to demons, a subject of which Cambyon is an expert. He does not like humans for their tendency to evil and wonders where the other Lunarians went. Of the entire group, he is the oldest at 9,340 years old at the time he joined the group. Lunarians have a lifespan of approximately 25,000 years, and always look young until their last 3 years of life. Wizaron has a young and handsome appearance, but since he has grown a beard, and his hair is naturally gray, he is often mistaken for an old man.

So basically Hellsing but with more of a realism touch inserted in a fictional universe? I don’t think that’s too out of reach for religious audiences. A lot of the best Christian literature has been penned by secular or otherwise morally questioning people. Tolkien was Catholic but he was also politically and socially kind of a fringie and an alcoholic too. Being a good person is not necessary to be a good messenger of Christianity, and being a good Christian doesn’t mean you have to be a good person. I don’t think masturbation makes you bad to begin with, anyway.

^Very interesting, and thank you for taking the time to post this! My mind did get some names and characters confused, but that's because I absolutely sucks at remembering names. I can also see the Journey to the West influences that you mentioned.

As for the religious aspect, besides the character Sister Sophia/Sofia's name being an obvious reference to Christian nuns and demons being born out of sin (though, Christianity does not really have a strong consensus on where demons come from and their are several different kinds of evil spirits and beings found within the Bible and other religious narratives that are just grouped together as being "demons," but that's a little off-topic), it seems to me the influence of Christianity in the story is fairly light. Anyway, I personally feel like as long as you don't do stuff like sexualize Sister Sophia/Sofia, most Christians (at least, denominations that have official nuns) won't think too much about or be offended by the religious aspects of it since you're pulling from multiple different sources for your religion.

If I have two criticisms, I personally would maybe change some of the gods' names, like "Terran, Ifrit, and Alastor" as those names are already used quite a bit in other media, which might make your gods feel a bit less special. Since its partially based on Journey to the West, maybe you can use some Chinese, Buddhist or Hindu-related names as replacements, like maybe Kurma (Incarnation of Vishnu associated with the Earth) or something derived from it to replace the name Terran.

The second criticism you could probably ignore, but I do find that like many fantasy settings, you place a bit too much importance on characterizing the gods of your setting than the religion that worships them. Now, doing this makes some sense, gods are usually the center of a religion, but a religion should also be characterized by its practices, traditions, holidays, ceremonies, influence on a society, etc. Again, a lot of people place more time into making cosmologies for a religion instead of the other stuff I mentioned. To use Christianity as example, yes the Bible does have the cosmology narrative of Genesis, but most of the Bible is spent on describing God's relationship with humanity and what proper behaviors and actions humans must do. However, I completely understand that your setting is more focused on action and adventure, and all this stuff I just typed out won't matter for a setting like that and will come off as jarring and random to include. This is just a small nitpick of mine that I often have with fantasy settings.

Hey, isn't that for your own world map?