Hi there, and welcome to Drawabox. Congrats on taking your first step, I hope you're ready for what's coming next. Here's my critique:

Lines section

Your lines may miss their mark this early on, but they're smooth and confident, and that's what's most important right now. Some do have a bit of an arc to them at one end so my best advice is to practice more and more moving forward and to be even more confident.

Ellipses section

You're drawing through your ellipses and they're mostly hitting their boundaries, although it seems you're having some trouble doing that especially in the funnels exercise. For that I only advise you to spend more time ghosting your ellipses before lowering your pen and to practice in warmups.

Boxes section

You've done well with these, especially considering they give a lot of trouble to beginners. Some of your boxes in organic perspective are flawed, but again, this is to be expected this early on: that's what the 250 box challenge is for. The main thing I have to point out, however, is that sometimes you feel the need to go through the same line more than once if you don't nail it in the first go. Avoid that going forward: if you mess a line up, just move on to the next.

Overall I think you're set for the next lessons. Don't forget your warmups, and good luck with the 250 Box Challenge!

I also have two more observations to share. Firstly, if you draw a line between two points and correctly apply the ghosting method, you should never miss the starting point, as that's where you start touching the paper with the pen. For example, in the ghosted planes exercise, I noticed that you have many lines where neither the start nor the end point is touched. Secondly, I observed that you have drawn two extra boxes in the rotated box exercise at the top and bottom, starting further rows which were not completely drawn. Only in case you are not aware of that...