Your ellipses are very well done. In the organic perspective boxes, I see a tremendous amount of improvement from your first section compared to the last section you did. Great job!

Regarding your straight lines, one thing I noticed is that your lines sometimes go beyond the point they're supposed to. My piece of advise on that is to spend a little more time ghosting to get a better idea of when to stop moving your pen.

Other than that, it looks really awesome! The rotated boxes are very difficult to do and it isn't meant to be something you knock out of the park on the first try. I belive Uncomfortable said he meant for this to be very difficult and the reason for it is so you understand where you fail and accepting it. You will get better as you go on so don't worry about doing it multiple times to "get it right", just do the amount of work he requires unless requested from comments.

Keep at it! :)