Would love Feedback!

I've been drawing for almost three years, but have been seriously neglecting my form rendering abilities, so I decided that I would start practicing for at least 30 minutes daily. This is my fifth serious session. Done as part of a 30 minute class. Looking to capture the overall proportions of the human form, as well as develop a sense of flow and weight. From left to right 30s - 1m - 5m - 10m