Hey, good job on completing the Lesson. As you already mentioned try to keep doodles and other stuff away from the drawabox exercises.

Lines:

I like your lines! You clearly take a confident approach and it shows. It looks like you are using your shoulder for every line. Don't have much to critique here, good job.

Ellipses:

Sollid ellipses. You draw them with confidence and repeat them 1-2 times. A few of them feel like you didn't use your shoulder completely but that is only natural and will get better with time. You kept the ellipses neatly in their bounds.

Boxes:

Great boxes. It shows that you already have some understanding of 3d space. I also don't have much to critique here.