• Ellipses: some of those in tables look kinda wobly make sure you're using the shoulder as pivot

  • Rough perspective: you're missing some of those lines quite a lot, do try to ghost towards vanishing point before putting dots for actual box lines

  • Rotated boxes: you're having some trouble with backside of the boxes and some corners do not rotate as much as they should, but I thinks it's good enough for now

  • Organic perspective: well it looks like all boxes have same rotation to the viewer (same Y letter of corner closest to us) but otherwise looks good

  • All other stuff looks great, you're ready for 250 boxes challenge

Do remember to put all exercises in a "pool" and spent few minutes (5~10) for warmup by doing some random ones from it (you can use flashcards app like Anki so that you can prioretize exercises you're having more difficulty with)