Without a GED no college will even look at a person....not even a junior college.
Getting a study guide for your GED is probably the best place to start. Moving out without a way to support yourself is impossible. Better to have your own internal drive to become independent than trying to find someone else & depend on them for your escape. People who are abusive tend to prey on people like that.
I don't know if your mental health status or if you have a therapist or psychiatrist but you might turn to them with this problem if you do & ask them what your best solution would be.
You need your GED before you can ever become healthily independent these days & not end up in a worse situation than you already are in.
Some junior colleges or even high schools have classed you can attend with others trying to get their GED. That would be a good possibility too. Can you get a drivers license & use the family car or use a bus to get yourself to the classes?
It is going to take your own internal drive to succeed at this point & just moving to another town or state won't solve your real problem.....it will just create more problems at this point in time. Probably a good idea when you finally are able to become independent. So I would start focusing on the best way possible to get your GED. That is what will start opening doors for you.