Day 2

The thighs look a bit long compared to the lower legs, which themselves don't seem to bend quite correctly and seem far too spindly. The lack of even the rudiments of a face seem strange for a 10-minute study. It's also fairly hard to tell from the way you present this piece if you used lines of action or other types of guides for construction in this piece, as there's no pencil marks; either way, not being able to see the way you built the figure limits the amount of advice I can give you on anatomical techniques. That being said, the foreshortening leaves a lot to be desired, and I recommend practicing drawing more basic 3D forms (cylindrical objects like cans or pipes, rectangular prisms like boxes) in perspective and then applying that knowledge to the basic forms that make up the human body.

As far as rendering goes, working on the fundamentals of form and perspective, being able to break forms down into planes that interact with light in different ways, that needs to come first before adding detailed rendering. No representation of the interplay of light and shadow, no matter how immaculate, can save art made with a structurally unsound foundation.

All that said, if you're as much of a beginner as you say you are, you're on the right track when it comes to anatomy. Your bodily proportions are fairly competent, and despite some issues (like, is her left shoulder dislocated or something?) the piece looks fairly even and coherent and the pose is pretty clear, which is saying a lot even if it is fairly simple. Keep at it, and get some books to read for reference. The recommendations given on the sidebar of this site are very good.