Hi, so the lines of your boxes are quite wobbly, but this is something you'll get better at when you do the 250 box challenge. Keep working on your superimposed lines and work up to longer lines gradually.

For the exercise where you draw circles within planes you were supposed to use the planes you had already drawn, I believe. It's not a bad thing that you drew new ones, more practice is good, so you can go back to your previous planes and draw circles in them to get even more practice. Good job on the rotated boxes!