Seems like something to look at is your attitude towards yourself and your work.
Everything from your signature to comments like 'contributing something worthwhile
' and 'something worthy of the crazy awesome art here
' say that you don't value the time you've spent getting to this point, or your own potential or whatever. I'm not trying to psycho-analyze you or anything, but your comments about yourself do seem pretty negative.
I've got ten years on you, and I didn't start seriously pursuing game art until I was at least 26. Even then, life got in the way and I'm still working on learning techniques and improving at 28. Saying that, I wouldn't change anything, because all my experiences in other fields and life generally have made me who I am today.
Don't kick your own ass about not starting to figure all this shit out at 12(!) years old. Christ, when I was 18 all I worried about was chasing tail and partying. It's great to approach anything with a humble attitude, but don't think of things in terms of 'worth', especially time.
The fact is you're at this point now
, and are looking at taking action to make something happen. Some people go their whole lives without either having or listening to that epiphany that says get your ass in gear.
Now get to it.