I think you've done a wonderful job overall!

Lines look pretty good to me.

In the table of ellipses, many of the edges are not touching, there's gaps between the ellipses and in between the ellipse and the lines of the box. Similarly, in ellipses in planes some are not touching all edges.

Some lines used in the construction of the organic perspective boxes seem to be drawn over more than once.

I hope these help. Congratulations on finishing the first lesson :D