Not sure about legs(and everything else)

[Blackskull27]

The goal is to use line to describe what element is in front and what in the back. Bold line for close element and tinner line for distant element.
Bold line over overlapping element and it recommend to also outline the silhouette 
Use tinner line for the inside detail of an element

Thanks for reply! I then paint over with color in my artworks, but that is a valuable knowledge. I`ll fix it. What do you think about proportions?