Hi Peaslepuff, I'm Domidii! I finished the first lesson only recently like you so I'd recommend taking my advice with a grain of salt:

• The only critique that I can say about the early work is the linework that came off the corner in the first page. I do not remember if it was a part of the example, but it might be concerning if your line exits the page; not seeing the full lines makes it harder to notice accuracy later down the line.

• While I do like your ellipses and their general structure, I would also recommend trying some circles as well. Additionally, I would recommend rotating the page (if you were not already) and working on horizontal ellipses a little more so you can develop drawing them in different orientations.

• Some later overall mistakes that might be good to point out the tendency for linework to rotate to the right a bit too much. I would recommend holding your pen over the paper after placing your first point and visualizing how that line will end up. Another way (although later in drawing a plane or plane) is utilizing previously drawn lines to parallelize with, visualizing that orientation and doing the previous advice to plot the following points

Other than that, nice work! I am especially impressed that your Ellipses in Planes and Rotated Boxes are accurate to the main examples! Personally, I had some trouble with the spacing and distortion of getting the boxes to rotate, but can do decently when it comes to organic perspective.