Hey! I have a little exercise that you might find beneficial to practice curves. You want to train your arm to make curves in one fluid stroke, instead of using lots of little strokes to find the curve. You can still "search" for your correct line, but you'll do your searching with those longer tapered strokes and that will result in a smoother curve. That is my only critique for you, that your lines can be cleaned up just a bit. I think you're making really good CSI decisions, with a healthy balance of curves and straights. Keep practicing your pencil dexterity -- the exercise I included below will help!

Hi! These sketches look great. You could start blocking in where your shadows would go. Keep form in mind as you place them.