Hey I think those drawings look really good! I think the proportions look correct, especially on adult simba! I don't think young Simba's back has anything wrong with it, I think maybe his eyes could be too far apart or something. I don't know, but it looks nice! I used to draw the Lion King characters too! I think about 5-6th grade, I could draw Simba without looking at a pic, I drew him so much, lol. I doubt I could draw him w/o one now though. As far as me taking art lessons...no, I haven't. I've had a thing for drawing ever since I was little. But I have taken many art classes in school. I *love* art classes. How old are you? If you still have years left in school, take as many art classes as you can!