first of all go down your local airfield an have a trail flight,if yo like that then do your ppl.I think you can do that and pass, when you are 17.
If you or your family have got loads of money (£40,000-£60,000) then you can start your commercial training,there are loads of schools about, try google,you can also try cab air.
I know how it feels to have the flying bug i did at your age and still have.
I hope this helps buddy and good luck for the future

P.S,Do your ppl, your enjoy it