Trying to Improve: Sketching

I haven't been drawing anything for a long time, so I decided to take up a few online courses so I can brush up on my sketching skills. Currently, I have taken up -

• The Natural History Illustration course on edx.org
• Urban Sketching Courses on Skillshare
• and Figure Drawing.. which I am practicing from the anatomy books I have + Proko

These are a few of the Assignment/Homeworks I did for said courses...

I also did some figure drawing but not uploading that yet because those are just action lines at this point. I also did some head gestures because I felt I don't like how I was making the head and neck.