(Flashing imagery warning for the links in this post!)
Recently I've been into Yello. They're a really cool band who doesn't get nearly enough attention. You probably only know them for Oh Yeah and/or The Race, but they've done a lot of othercoolstufftoo, and they're still together!
The game Look Outside has a bunch of fake video games in it that your character can play to get XP and learn skills, and there's some funny character interactions with them. Likewise the Sims series has games that your sims can play.
There's also SBURB from Homestuck (which starts as a video game at least) and the various games from Kidd Radd, which I don't know if that's archived anywhere but I hope it is [EDIT: It is indeed!]
These are just a handful of these types of stories, there's loads more if you want to search for them. But the upshot is: your family or tribe would have taken care of you to the best of their ability, for as long as they could, and you would have been given a decent burial when you died.
Your best bet might be to try and pivot to in-person college/university if possible. You didn't say where you are in the world, but in the US, most schools will have on-campus housing you'd be able to stay in for most of the year. The financial part is always the limiting factor of course, but considering how violent your brother can get, it may be worth it. It's a lot easier to recover from student loan debt than being dead.
It's specifically the fact that it's family that makes it hard for me to buy that it's isolated (hence "in this case"). It's possible for sure, but you don't usually get "my dad picklocked my bedroom door to try and catch me jerking off" without a shitload of other family weirdness.
To be clear: there are actually Christians being persecuted or killed for being Christian, just not in the US or anywhere else in the West. The people that Trump and Nicki Minaj are talking about are in Nigeria (and I'm sure Trump would want them deported if they sought asylum in the US, of course). Trump and Nicki both suck but we can at least not make light of religious persecution in other countries, just because Christianity is more dominant here.
I doubt I'm the first one to think of this, but for some reason as I was drifting off to sleep last night, I was thinking about the horrible AI "pop" music that a lot of content farms use in their videos and my brain spat out the phrase Bubblegum Slop. Feel free to use it as you ses fit (or don't, I ain't your dad).
Cooking With Jack just hasn't been the same since he had his third stroke