So, here’s my attempt. Left leg is a little wonky, but whatever.It is tricky. I usually need a reference photo or drawing. I‘ll then fill in shapes, and add the details afterwards.
I could attempt a step by step demonstration later if you’d like.


This is was my reference.

I do a center line, following the body’s curvature.

Add the shapes as best you can.

Touch up the details (maybe add some arms), make sure it’s proportional.

Erase and darken lines.

Add shading.
Hope this helps.