Here is my attempts. Critique is welcome!

In the study 1.1 I tried my best to analyze what I was going to draw but it was too complicated for me so I design to copy picture of lower leg from the cover of the demo video and when I tries my second attempt in 1.2 after watching the demo, I still couldn't figure it out what to draw so I just designed what was supposed to be based on the info I got in the demo video. In the study 2.1 the similar situation happened with me again. Any critique is welcome!