Sainty,
I hope we can be of help. Trusting your contributions so far - which seem genuine enough - you are taking a sensible approach to your career choices. My advice for you at the moment:
First: STOP, STOP, STOP. Don't rush into commiting yourself to anything. You are, as you correctly point out, young.
Second: Have a look at the "The truth about RAF flying thread". There you will find Gareth, who allegedly has A* at GCSE, writing some ill-composed nonsense and getting stick for it.
Third: See that you are far too smart to jump into anything just yet.
Next: Take all advice with a pinch of salt.
Then: Seriously consider getting your head down for some concerted study at your local college. Get the quals you were given a smart, inquisitive mind for and keep up your outside interests. ie. get busy with your life.
...in terms of gaining qualifications, you have plenty of time.... a whole life's worth! - why waste it?
Get qualified, then... take your skills to the best employer for the job you want to do - be it tavelling the world professionally, or making millions in the City. You get a fair whack as a GP nowadays. Whatever floats your boat. Most here would recommend pilot!!
If you then decide to become a mover, bloody good luck to you. You'll still have time to do that and another career at least. Using the above method, you will have the option to do that, or anything else you want.
You can,, of course study within the RAF as a mover or any other branch of course, but you may find it hard to study and work. There may be limits on your career options once committed.
You don't have to listen to any of this, of course.
Good luck.