Don't express yourself around people, just try to be as cool as possible. Only show your real self when you're alone. Also learn that people don't like it when you have fun so just keep that to yourself. When your family wants you to stop drawing porn just tell them you like drawing it and would like some space to be able to do it. And try to keep all your drawings to yourself.
There's nothing wrong with wanting to create a videogame, there's nothing wrong with creating characters, just do not under any circumstances say that you are creating a videogame or try to create a videogame. Keep that to yourself. If anyone asks, just say that you're drawing. Don't run in the halls. Get used to getting screamed at, just tell the person the yelling was unnecessary. Get used to apologizing... A LOT. Try not to masturbate, you're not allowed to.
Don't try to make friends in school, if you want to talk or interact with people just play mmos. Focus on mental health and self-therapy A LOT. A LOT. A LOT. A LOT. Do not do anything with Christianity, god, or religion. Yes it's insane when that's forced down your throat and you're brainwashed but just do not do it.
Don't take any AP classes under any circumstances. Just focus on getting through highschool. Don't try to talk to people. In art class, don't show off. Just draw passable pictures, try not to make your art stand out even though you really like drawing and enjoy it just don't show it off. In gym class, don't run fast. Yes it's against your every instinct to run fast since that is how you cope with life but you know what just don't run fast. Even if your teacher pulls you and asks why you're holding back, just still don't run fast. Try to be a normal student. And just get through highschool and college, as long as you graduate highschool it doesn't matter.
When you're about to say something to someone, take deep DEEP breaths, critically analyze it, and ask if it is appropriate to say. Do this until this becomes natural. Do not join the Sonic fanbase, don't become interested in Sonic just stick to kirby.
When someone gets mad at you just apologize. You have literally no idea why you're apologizing but just apologize. Do not focus on suicide methods. When your family wants you to get a job, just do it. Don't ask questions, just do it. When they force you into community college, just go there. Focus on therapy and deep breathing. When you find a game you like and a discord about it where people can talk about the game just don't talk about the game there. Yes it sounds insane but this is what you have to do, just focus on posting your stuff on tumblr or twitter or wattpad.
When you are looking at suicide methods, don't do anything until you find the shotgun method. Don't look at hanging, SN, F, N, anything. Only focus on the 12 gauge shotgun. Now you'll be living in a motel and jumping from hotel to hotel so just try to hide it somewhere.
NEVER RESEARCH LAW OF ATTRACTION/ASSUMPTION/NON-DUALISM. Leave those alone, that will be the biggest mistake you could ever make in your life. Don't join after school clubs, even just to know what they're like because apparently you (not anyone else, just you in particular) will be forced into them against your will.
When someone gets offended at you just say, "You're absolutely right and I'm sorry have a nice day." Let people win internet arguments.
When you're in your apartment at home, don't run. Don't even run outside near the apartment because apparently there will be people who will criticize you or want to talk to you or bother you about the fact that you are simply running for fun. So go somewhere, I dunno where but somewhere close but free where you can freely run in peace. There's gonna be a bunch of guys who bother you about this. You gotta just tell them no and let's not be friends.