Hi there, sorry your critique took so long! I was very busy with university so I couldn't find time to critique everything

Starting with organic forms, they look pretty good, you got a tiny bit of pinching here and there, so don't forget that they should be 2 identical balls connected by a tube of consistent width (so the balls make that their ends have to be rounded).

Into your insects, I think you're doing overall a pretty good job.

Although I can see a few issues.

Even though most of your drawings feel pretty 3d and solid, you aren't drawing through your forms most of the times. Remember that you should always draw through your forms, and you should draw the intersections between all the forms you put into the page, that includes intersections between sausages.

You also seem to be trying to make an underdrawing part with lighter lineweight, and do a finished lines part with heavier lineweight. You should avoid this. Construction lines should have the same lineweight as "finished" or visible parts.

Another part is drawing big. You seem to be trying to fit as much drawings as you can on a page, but avoid this. Drawing bigger will make it easier for you to solver spacial problems, so I would draw as big as you can, I even recommend to draw only one subject per page, on this and on the next lessons.

Remember you can also draw cast shadows, they are pretty effective to anchor your drawings to the ground, even if the shadow itself isn't accurate.

Pointed out a few of those things here, I hope it helps!