Hello!

First off, congratulations on completing the challenge! It's a difficult feat for sure, so when I go into this critique keep in mind you've done a huge thing already, just by being dilligent enough to complete this.

So, from what I can see, overall you've understood the exercise well. There are a few times where you go over your lines, or they get a tiny bit scratchy, but for the most part your line quality is good. Your boxes may have benefitted from a tiny bit of line weight, but that's alright.

When it comes to vanishing points and congervence/divergence, it's really hard to nail them, and perfection isn't really expected of you here, though you should strive for it. That being said, I can see you had some trouble with the back lines, especially in your early boxes. Here is where multiple checking and rechecking and readjusting comes into play. A lot of people (myself included, so keep in mind I am biased) find it helpful to put a dot mark as a rough estimate of where the line would go, then check that dot with the remaining lines that would intersect, and if it's not right adjust it again, etc. I can see you've done this in some of your boxes, but seems like you stopped at some point. It might be something to play around with as you warm up.

Another thing I found particularly helpful was ghosting the line back to where I think the VP would go, even if it's off the page, while keeping the other lines that go to the same VP in mind, trying to see the "big picture", if that makes sense. Either way, there's going to be a bit of guesswork, and your convergences definitely greatly improve as the number of your boxes increases.

I also like how you started to play around with different rotations more, while keeping the boxes solid feeling, as you went on with the exercise. That was very exciting to see!

So, in conclusion, well done on the exercise! The biggest takeaway, really, is try not to go over your lines twice. Good luck on your next lessons!