Nice work! Keep it up and thanks for the updates.
Once thing that helped me out a lot was to use a set of brushes from Marc (don’t know if they are still available for free (or with a big discount) or not.
I feel like they are more smooth and hence more “forgiving” when we do multiple stroked to get things right, making the piece look better (and less “sketchy/hairy”).
It’s good advice to go through these exercises a few more times to get the hang of it.
If I may give some feedback:
In one of the cylinder exercises (where the guy is laying down on a press holding some weights), the legs and then knees appear to be facing the camera a lot, but both the beginning and the end of the cylinders look a bit flat (which removes the volume from the form).
It’s also good to get to a point where you can just copy from reference instead of tracing on top of it (I’m still doing that).
Other than that keep up the good work! I love how you are focusing on the practice of the exercises themselves (like the proportions one).