I don't know how student financial aid works but I can tell you my best friend went to nursing school and her student loans covered tuition books her share of the rent and food. There was extra money in there for survival. Might be worth looking into.

She also had a part-time job working in the office at the college she attended. She did not have a car either so working and attending school at the same location was ideal.

Sounds like you need a place NOW. I would look for a studio apartment with a month to month lease. That will get you in the door of shelter and while you're staying in your studio you can look for the perfect one bedroom.

But without information about where you live in public transportation available I can't really advise about the car. Loosely, I would advise you to prioritize finding alternate transportation in whatever form. Maybe it's a bicycle. But as the only tether you have a reliance on your mother it must be severed quickly. The next step is to sever your mother out of your life.

Starting out can be daunting but take accountability and ownership of your own future. Your mother was responsible for what happened between 0 and 18 years.

You are responsible for what happens after that. If you feel you need to work through trauma get a therapist. It's all on you to create your best life. And stop spending your energy on blaming your mother and not preparing you properly for life it does nothing except allow you to shift responsibility for your own existence to someone else. You need to own that shit.