It appears that you are focusing on full gesture drawing and that is really a good way to go.
I am not sure if you are drawing from a live model or photos.
My one thought is this, you are drawig with lines which is a great place to start.
Possibly try holding your pencil or charcoal underhanded. You'll start to draw with you whole arm.
If you want to chat about what I'm putting here email me at todd@mediaspiders.com
We have drawing group that meets a few times a week to draw from live models.
I can share what I've learned.