If you were sufficiently interested in flying, you would have been reading all the magazines you could lay your hands on for the last five years or more and would know all the answers to the questions you have just asked.
Perhaps you became interested in flying late in life (i.e. after puberty) in which case you could have found out all the answers to your questions by lurking on this and other aviation boards for a while or even by looking through the archives.
Just to save you some time, forget about the Royal Air Force.
1 They don`t want anyone as poorly motivated as you.
2 You wear glasses, so you have failed at the first hurdle.
Sorry about what many of you may think of as an unneccessarily harsh response but I`m afraid I get a bit short with people who expect others to do all the work for them.
Mike W