So here is my attempt. In the Hiechy I put more weight in the general shape. I think I will try again that one later and see what body parts I can give more focus or separete from the general shape. I tried my best to indicate that the light is coming from the right side.
So I redraw one of the photos taking into consideration the points in the video. One of my mistakes was that I focused a lot on the contour and I tried to do perfect lines. Also, I stop worrying about proportions and focused in the connections (I did a few mistakes with the arms but I'm still satisfied with the result)