Love your line work, shows effort and patience! A couple times the boxes diverged away from the front corner, making the box appear like a pyramid with the tip cut off, ex: 302 and 303. Some other diverge, which I place in the notes in case you want to look over them. Love that 328 has a back corner in line with the front edge, which shows confidence to trust your instinct.

Also your focus on the hatching shows results! I think you're ready to move onto lesson 2 and I'm going to mark this complete. I'm in your cohort, so I could be wrong. Hopefully others will chime in if so!

https://i.imgur.com/8PqQLE0.png is the diagram offered in official critiques, ex: https://drawabox.com/community/submission/KCVNTJ0V and https://drawabox.com/community/submission/3JVR7QEY

Notes:

304 diverging back plane

302, 303 diverging top plane

258 diverging front plane

nice hatching!!

260, 348, 349 diverging back corner

349 top plane converges quickly

Super solid line work!

328 nice! Not afraid to put back corner on top of other edges!