I need guidance/help on how to cope my current situation

I know that what I'm doing is wrong and I should've kept it to myself because it is I who can only fix my problem but at the same time I am a teenager with absent parents and I need other peoples perspective on what to do. I am a High School Graduating student taking the STEM Strand and my situation right now is that I transferred to another school that is 2 hours away from my hometown in the City and I am currently living with my aunt in the province, ever since I transferred here my emotions are heavy that whenever I go to my new school and come back home I cry silently during the ride. I know that we are struggling if we stay in the City because we don't have guardians but my only issue is that I'm already about to go to college yet my mom does not allow me, if I attend here I have a lot of subjects to catch up and if I stay in the City then I wouldn't have to. I find it really hard to adjust as I am an introvert and I prefer to keep quiet and stick to what I'm comfortable at and I have to adjust to the new environment, schedule that I'm not used to, strict school rules, noisy surroundings, and unapproachable people since they already have circle of friends of their own.