Are your parents missionaries? Sounds like it. Maybe you could get away by going to a missionary boarding school.

Also, you are so young and sounds like you are confused sexually from your posts. Kiddo, you have no idea the shit that awaits you on the street. You are young and have been protected so I doubt if you are street smart enough to come out unscathed. Most kids end up selling themselves on the street. It’s horrible and soul crushing. People will be worse than you ever thought your religious parents were.

How about thinking about your future. Do you want one? Make a plan not just an escape. So your parents don’t want to hear you are trans? Then shut up about it. Do your work. Live your secret life and don’t expect them to agree. When you are old enough you can join the service and they pay for treatments if that’s what you want.