I would suggest working & living on your own for a few years before starting college if that is a route you are looking forward to. It's important to be familiar with managing life as an independent before adding school work to the mix- to be most successful. You may be able to find a shared house that is renting a room for cheap online - I'm in many Facebook groups where people can look for roommates. If you find that you are having difficulties managing life without familial support, I would recommend looking info finding a case management program. I am in ACT case management due to mental illness and having been a homeless youth, and they are very helpful providing therapy, housing vouchers, transportation assistance, job search guidance, food boxes, moving help & furniture, grants for needed items for work or home, etc. You are not alone. It was definitely a struggle for me to gradually learn all these skills and find relevant supports but it can be done!
Disregard pinhole, It sounds like you are looking forward to moving on from an abusive home, if so, their advice is moot as that is a totally different experience.
One more piece of advice. I thought that it would get better immediately once I got out, that I would find immediate relief and a better life on the other side. Do not be surprised if that is not the case, but don't be afraid either. It's very possible you may need some time to process the massive life change and grieve the past many years. It can be extremely disorienting and scary to wonder what next, but I assure you that phase passes. It would be a good idea to surround yourself with supportive people who knew you before the change, I found that meeting all new people while I was going through this was difficult. Good luck, and happy healing ♥️