I see great progress over these pages. The public sniper drawing is very good, and especially the fact that you do so much of it is good. Whenever I try doing that, I just draw one or two persons and then give up because no one keeps still!
I espicially like your self portraits. Do more of those. Try not to start rendering too quickly - you want all the proportions to be correct first. Begin with simple shapes, don't go into detail too soon. Many of your SPs are too long, or too thin. Make sure the basic shapes are correct before you move to details and rendering.