How do I legally move out??

You might need to go through the DHS for this one because you can’t emancipate (you aren’t preggers are you). If you are being abused, then you have every right and legal power to remove yourself to a safer environment. You only need to present your case to a social worker. It’s really simple. Just go to a Doctor, Sheriff, Teacher, Counselor, Cop, etc… Any authority or public servant can help you. I’m sure it varies state to state, but I think if your parents and the other parents both agree to such a thing, then it would be legal, and easy.

But before any of this should even be considered, I recommend you give your situation a lot of thought. Please make absolutely sure that this is right for you -and- your parents. Also, you need to be clear on all of this with the family you intend to join. Are they concerned for you enough to legally pursue custody of you? If they are not willing to fight for you a bit then you probably shouldn’t get wrapped up with them. You really need to be absolutely sure about this because it will completely change the events of your entire future life.