Hello, I hope my feedback helps you out.

First, your lines are confident but they seem to overshoot the mark quite allot. You'll get better at the accuracy as you get more experience.

Second, your ellipses are pretty decent. They seem to hit the mark and are confident as well.

Finally, the perspective on your boxes seem to be off, but that's normal. When you do the 250 box challenge you'll naturally get better at the boxes.

I think your work is pretty good, I would recommend doing some lines exercise as warmups as you do the 250 boxes. I think ghosted planes are good to get better at creating accurate lines. Overall, I think you understood the lesson and I think you should move onto 250 boxes.