I wouldnt really know what to say, apart from do what you want to do my friend!
This game is a killer, even if you are 19!
If you are serious about a life change, its not all about money, and you can afford to take a major drop in income. Get on it!!
I blew a major career, 50K plus a year, and it was easy money. But like you I wanted something different. A life that I only dreamed about. Something that I thought I was not worthy of. Yes I tried the RAF like you, not good enough, BA pilot training, blew it! Gave up.
Then I decided I could, went for it. All the pain, trials and tribulations and got there. It was'nt easy, I am not an airline pilot.
Earning seventeen an hour and lovin it! Not alot, but in my mind its a means to an end. I am going for it.
I enjoy instructing now, its ******* great, and who knows? If I keep it it up, maybe I will get there someday.
A fellow.