I found myself actually being able to do things I thought early on I could never become good at, and pretty well.

If anything, now I treat that unpleasant feeling of perceived impossibility of something as a strong indication that I should pursue it. It never let me down.

I think pretty much the only thing that disqualifies you from becoming a fighter jet pilot is an untreatable bodily impediment. Well, also pacifism, but that’s chosen :)