I can definitely see some improvements compared to some of your earlier drawings. You can only get better as time goes on, but only if you keep on doing what you are doing. I remember back when my sister started drawing in middle school, and when she showed me a picture that she had drawn, I didn't think it was very good because my drawings were far better at the time, at least form what I could remember. Fast forward several years later, we are in high school and I can't draw to save my life since I stopped trying, and now I think she's gotten pretty amazing. I know it might sound kind of corny, but that's what I believe.