Teenagers never have a balanced lifestyle. To find a balanced lifestyle, one needs to experience the extremes first.

Make sure to move out once you are old enough and move to the other side of your country.

Your parents are nutjobs and very bad at parenting.

Are they some kind of religious people ? I have only seen such specific crazyness against technology in religious weirdos.

They don't respect your privacy, they steal money from you, they don't respect your property. They are bad at being parents.

THEY DONT TRUST YOU. They don't trust that you will find your own way. Which is kind of the opposite of what a child needs from its parents.

stay focused and know that it's not you that is weird. Is there some kind of counseling on your school system ? You could maybe use that to find solutions.

Is there a friend who can help you by hosting a computer. You could form a learn-group with him to have an excuse to go to his place often or s.th.

Well however, as some people have suggested, find a place