First time using Paint Tool Sai Ver. 2

This was the first art work I've complete when I started using Paint Tool Sai (the IkeSen fan art was made in Medibang), and if you haven't noticed it yet, I was a complete noob at using the software, it was too complicated to be, but I'm willing to dedicate my time to getting used to how it works.

Looking at this now, I realized that there were a lot of things I could still improve on it if only I knew half of what I've learned about the software when I made this, but then again, I'd like to see how well I do the next time I make something else.