Heyo! The files are private/require request to see !
One thing you can change to nail the body parts and gesture down is to trace one big line that compensates for a leg and the back, then you draw a curved line for the moment the leg start and one for the shoulders. Draw a vertical elipse for the rib cage and an other one, horizontally long elipse for the hips area. If you want to see an example ask me. Nice contours btw I think it would be easy for you to simplify the human body.
Looking good! I would suggest as well finding a way that works for you as user Idon'tknow mentioned, adding some more guiding lines be that through the classic single curved lines.
Or even just segementing the body into two halves! Either I suggest looking at some other approaches to the way people do figure drawing to find a style or way to segment the body for better structure and dynamic poses that works easiest for you!
I think I have a similar style to you in terms of gesture drawing approaches actually! If you want I can also send some of my own examples if it helps at all!