Before you start, be prepared for some unhelpful responses here, many ppruners seem to like pouring cold water on requests like up yours. Main advice, get in there and go for it. Take all the opportunities ATC offers to get airborne, gliding, air experience, whatever. On top of that, get yourself down your local flying club, there's often spare seats going. If you want into the airlines, sadly that requires a hefty financial outlay these days. Military recruitment down to a trickle. Likely someone in ATC can detail the process.