I also did some fundamentals like drawing circles, straight lines, etc. Those are really hard, especially digital.
I also watched some of Anthony Jones Gumroad tutorials, which you can find here:
https://gumroad.com/robotpencil# After watching "painting with confidence" I was super pumped and tried it myself. Failing pretty much, but learning something on the way.
I also did a quick still life, around 20 min, of 2 oranges. What I found most interesting was that the cast shadow was colored where the light hit the oranges and then went into the shadow. Weird stuff and I am not sure, if I really understood it.
Lastly I started the second assignment for the Mentorship, this time only dark objects.