BY,
you first need to consider whether it is worth getting away from your parents. If you hopefully have good environment at home and your parent are supportive of your goals, you will achieve more while staying there. I heard it both from Mark Twain (“When I came back home from college, I saw how much smarter my father became!) to an O- Rabbi who spent years dealing with O- students at an OOT Hillel and penned an article calling parents to send kids to college close to home (undermining his own job). Kal vehomer for high school.
So, then, find a high school in your area that is solid religiously and makes some moves towards college prep. Then, you or your parents should talk to them and see how to enhance it, or let you learn on your own for some classes. Maybe take some enhanced classes somewhere else, possibly in college.