One more small point - a small poll: I am, in my family and friends, surrounded by current and retired aviation people - commercial pilots, a test pilot, military pilots, engineers, cabin crew, instructors, even some managerial types.
Not one does
not have their HSC/VCE or equivalent (ie. they all have that - they all finished year 12) and most have a university degree as well (some more than one).
Mate don't grow up too fast. Enjoy your youth. Get out there, get drunk, sh
g girls and be silly while you can get away with it. Life will catch up with you fast enough, don't go looking for it.