As someone of similar age and aspiration my best piece of advice to you is to go to University, join the University Air Squadron get some flying experience and get a degree at the same time.
You sound like you're quite switched on (Maths+Computing degree) so why not apply for a bursary from the RAF, they will help towards your degree. You'll earn a degree from a British university which is second to none internationally and will have a very strong reputation.
Once you get to University your parent's influence on you reduces and you will be free to do what you want to do and if that's flying and serving your country then they should be proud.
Don't bother with the PAF, in a few years the RAF should be in a better position to recruit and with a degree and University Air Squadron experience behind you, you should be more competitive at OASC.