Greetings! In addition to what you're doing right now, I would suggest drawing some gestures for hands, feet, and faces separately. Also, to make your final drawings accurate, simple, and more "artistic", I strongly recommend copying plates from "C. Bargue Drawing Course" with an emphasis on getting accurate proportions and lines (it's a very old book, freely available at archive.org). There are plates with parts of the body and with full-figure drawings.
This will add some new and useful challenges! 
