If you're fairly new to bonsai, you might not have experienced the way bonsai practitioners critique each other's trees and offer suggestions. I see some things that I would have done differently, and can probably help you with some suggestions/observations, but I don't want to do that if you'll be offended by it. I remember when I was starting into bonsai and how much more I learned by seeing my trees through the eyes of others. Hopefully, you already feel that way or will come to feel that way because it will help you up your game.
I have grown trees out in the ground, lifted and them, and took them to several bonsai friends for their opinions, some of which lived 100-150 miles away. I don't/didn't do that for all trees, but when a special one comes along, there is a sense of obligation to do whatever is best for the plant's future, even if I'm not the one to fully bring out the features which are most outstanding. Anyway, I have some thoughts if you want to hear them.
Do start a bonsai thread. I asked about a special forum for bonsai but I got the impression the question had been raised and consensus was there wasn't enough interest. To be fair, that's just my interpretation derived from reading between the lines. I could be completely off the mark.
Al