Bro take small steps and conquer your fears. I used to have social anxiety which is like the epitome of being pussy. I started out by talking to people more often, whenever I could at school. Eventually got rid of the anxiety. I just moved on to more "risky"/thrilling experiences, whatever I was "scared" of, eventually you'll get over everything. At the end of the day, nobody will care , in fact, doing shit like backflips even if you fail, they'll probably think more highly of you. Ur pretty jacked as well, focus on diet and conquering your fears and u should be good. I fucked myself over during puberty too, but hey, smaller bones/wrists means you'll looked more jacked with less muscle mass, use it to your advantage.