How do I get out at 16?

Hello everyone,

I urgently need help because I'm really at my wit's end. As you may have read, I'm 16 and want to leave "home." I simply don't feel safe here anymore, and I haven't for two years. My mother drinks almost every day, and when she drinks, we always end up arguing at the end of the day. Things escalated in January to the point where my mother threw me to the floor and hit me so hard that blood came out of my nose. And whenever we argue, she locks the front door so I can't get out. I've also had pretty serious problems at school, so much so that I almost didn't get my H-level certificate last year and I almost didn't make it to year 10 to get my R-level certificate. I've told her often enough that I have to study, but she didn't listen and kept saying I should study sooner. I also know very well that my mother wouldn't agree to me being put in a group home.