[link] I'm practicing on drawing different human poses. You can use it as a reference if you want, although the anatomy is not perfect. I focused at drawing the shape of the bodies so I didn't pay attention to the hands and the feet.
The paper was abused, that's why it turned out like that. Just use it as a reference. It's not necessary to draw over it. If you just try to draw over it, it's not worth it. You will never improve like that, trust me.