Restraining Order On Abusive Family?

Location: Canada. Sorry, not really sure which flair to add. I’m a minor, and my brother used to be incredibly abusive to me—(TW for abuse) he’d tell me to end my life, that I’m worthless, he’s hurt me physically, kick me, restrain me, call me a bitch, said I deserved to die because my life was worthless and I was a failure, said he was gonna kill me. And I believed him, back then, I’ve grown now, but I’m still terrified of him—he hasn’t said these things in around… a year? But he is still AWFUL. Even if he doesn’t outright say these things, he still takes his anger out on me and manipulates our mom into thinking everything is my fault and that I’m terrible and a useless failure, to the point my mother sees anything and blames it on me first. Granted, my mother isn’t much great either, she lets it happen and abused me herself. Again, it’s gotten better. But I am so sick of being scared all the time they’re home. They both abused me into developing a disability, physically, and c-ptsd, so I can’t work to escape here either—also, a minor, so can’t really get a house or anything. So I’ve opted on a restraining order on my brother. At least my mom doesn’t bother me or abuse me if I don’t talk to her, sure I feel scared around her but compared to him, he’s way worse currently. I can’t live with my father because his current wife is very unstable. So, okay, my brother used to tell me he’d kill me, but in return so did I as a response to his abuse. I used to have a video of him saying he’d kill me, but it’s gone now. Is there any way I can get a restraining order on him, or at least a way to legally get out of this house or avoid them? Also, my mom said she’d sign me up for adoption years ago but never did, don’t know if that counts for anything. I don’t have physical proof of anything. He’s only home for a few days from college a week, but those few days are hell and leave me in flashbacks and scared and commonly wanting to die. Honestly, if there’s literally ANYTHING I can do, that’d be great.