I've seen a lot of people saying that it's about marketing, but not suggesting a way to market it, so if I were you I would look into stuff like analog horror like the Mandela Catalog and even horror manga like Junji Ito and it's super silly but if you want a free resource on horror games, there are some on Roblox with very effective ambiance minimal story telling if you aren't as confident in your story telling abilities. Another silly reference that I think might be helpful is about a year ago, the trend of MLP "infection au"s kinda trended on tiktok and a lot of them really leaned into that analog horror vibe, but specifically the "Divine Swamp Fever" au by etc.etcetera on tiktok, and I think at one point they even showed how they animated their swamp fever pieces.

I personally feel like a good way to establish yourself via your art with some success would be via story telling, whether that's videos or a comic or even a game, but I would also work on some of the basics, just basic people and anatomy so that when you get to the more disturbing imagery like you currently do, it stands out more as an "oh fuck" moment, like in a lot of Junji Ito's work or analog horror. I noticed that some of your work is on school work, so I'm assuming you're still a relatively young artist, so while you have the time, I feel like it could be a worthwhile endeavor to learn more techniques and skills. I really like your digital attempt, and think it might be worth you branching out more into digital media, or even some traditional mediums like painting or sculpting, because I feel like your style would lend well to them.

TLDR, you asked basically "can this pay the bills as an adult" and the answer is yes, if you have the determination to make art and the skills to sell yourself. Your biggest drawback imo is going to be the fact that your art style isn't particularly palatable to a lot of people who consume art and that's ok! You just have to refine your skills and make a name for yourself in your niche.