Cool object! Just another student here working on the same lesson and decided to give this one a try. Since we’re looking down on it, I tried approaching the rear and lower cross sections similar to the upper section and used more horizontal tilted ellipses. Here’s what I came up with for comparison.

I think you did great! There’s a nice variety of different shapes and proportions here. You did a nice job simplifying the shapes. The critique I would give is one about anatomy. The trunk of the elephant is a super important feature, so it may be worth it to learn a bit about the bones and muscle that go into it. Just some basic stuff I think would make your drawings look more elephanty… Elephant skulls look so crazy. Their nasal passages are actually above their eyes. The actual trunk has no bones. The trunk is full of strong muscles and acts as an extra limb for grasping things. It’s not just a typical nose. I hope this helps. I know it’s more advanced but I think you can handle it. Your drawings are looking awesome.