If your mother is a US citizen, you both could move to (a less populated county in) MI, VA or NYS ( * ) now and go to a public HS - living in a state before HS graduation and graduating from a public HS there should establish you as a state resident for tuition purpose.
NYS is pretty rigid when it comes to placing you in classes etc. But the education system and college network is good. MI has excellent universities as does VA.
Less populated counties tend to be way cheaper to live in. They may have fewer job opportunities and often require one to drive.
Your mother would have to work but regardless of her qualifications there are lots of job openings right now in the US. Same thing for you, you could get a week-end job at a retail place or a restaurant that pays $15 an hour (those do not exist everywhere but you can inquire.)
(* states all have different rules but these 3 states I think have a “attend&graduate HS, be considered in state at public colleges” rule. DO check bc that’s outside my purview.)
Because college in the US is thought of as more than “buildings where you take classes”, you would likely be required to live on campus.