Hello Castil, I'd agree that your structure underneath isn't the best, and if I were you, I'd go back and redo the spine/ribcage assignments to really know your stuff. I won't look focus on the forms of each piece (your ribcage shape looks really good), but more of it's relation with other parts of the skeleton. Focus on getting proportion correct before moving onto more fun things such as muscles (or breasts). In addition, I'd recommend gesture drawings in tandem with anatomy. Stan always says that when we draw anatomy, we stiffen the flow of the figure. I know it's hard to bounce between gesture and anatomy, but the earlier you start the easier it we be. And there's another quote I really like (sorry I forgot who I'm quoting): we learn anatomy to make our figures more believable, not to draw every muscle. In other words, shape the anatomy to follow the gesture, not the other way around. Lastly, line quality. In Stan's "How to Hold and Control Your Pencil" or Mike's "How Asymmetry and Anatomy Go Hand in Hand" (both here on Proko) videos, both talk about how hairy lines take away from the feeling of a drawing. I understand that how to hold your pencil doesn't apply to digital, but the idea of controlling your line type is still relevant. That's about all for now, I hope I don't discourage you from drawing, I just don't want you to take as long as I did to figure these things out (I don't post much so had to figure it out by myself). And although I'm not that good at digital, I'll post my digital gesture drawings I did today in case you want to see where I'm at. - Dwight