i’m open to feedback on drawing

Hey Everyone ,  this last month (or so) studies have been dedicated to drawing, I copied along with the NM instructors on different courses.

My purpose was to get better at drawing in general, 3 of them are master studies so I could understand a bit of the master’s way of drawing,   suggested from the 1×1 coaching program.

I Basically used Black and white Charcoal on tone paper and purple color pencil

Any recommendations on new masters drawing courses on old masters drawings lectures will be appreciated, any feedback on charcoal technique, subtractive drawing, or figure drawing, in general, are welcome, Thanks. ::)