Student Needing Help?

I am 16 years old and currently living in the UK. I attend college (A-LEVELS) and taking Maths, Physics, Computing Science and Economics. My ambition is to become a commercial pilot. I would also like to attend University. I am not sure what to do after I leave college, or how to get involved with flight training. So far the only ways to enter Flight Training (which I have heard about) are to pay the full fee's or get sponsored training or by joining the Royal Air Force. I just need some advice on how to push forward with my career goal.