Firstly good job on completing lesson ,

But there are a few critical aspects

Lines

I had no problem with your lines, they were drawn confidently and fairly accurately, you did a great job

Ellipses

your ellipses where drawn through 2 to 3 times so you clearly understand what uncomfy said to some degree already. Plus your accuracy on the ellispes is great, good job on that!

Boxes

you drew the boxes very confidently,good job

now im gonna give you a tip that i always use when drawing boxes in perspective

o remember when you draw boxes in perspective avoid drawing lines parallel lines because those lines gonna convert to each other at some point ( keep in mind: for 1 point perspective the horizontal and vertical lines should be parallel and for 2 point perspective only the vertical line will be parallel )

there is one tips that i usally do when drawing boxes in perspective manually is ghosting the line from the start to the vanishing point that way can help you have more sense of where the line should go, of course this method wont makes your lines 100% accurate ( also remember ghosting help you to see the line without draw it on the paper, that will help you to know where there line should go and how it would look if you draw it on the paper so ghosting is very important)

not lets go to the conclusion of your work

_what i love about your work is your line confident, they are really great

_dont stress your self out too much about the perspective exercise because perspective is a difficult thing to understand at first so dont worry too much and you can have a chance to practice perspective in 250 boxes challenge