1) I'll address the first problem as I'm still seeing wobbling. Wobbling is (usually) from your eye/brain trying to correct the line while in flight. Try drawing your lines a little faster - you can slow it down later when you have more control over the line trajectory.

2) You didnt place dots for every line, on every plane. Take your time, place your dots, and then ghost/draw your lines. Dont forget to rotate your paper so the motion you are drawing wis the same for each line. This is what builds muscle memory.

3) Ellipses -- Your top left is pretty confident and smooth, although you didn't manage to draw it through 2 -- We are supposed to draw through our ellipses between 2x and 3x.

I'll be asking for a single page of ghosted planes, and then add the ellipses in those planes (picture of ghosted picture of ellipses in planes). Pack your planes on the page similar to the example homework and directions https://drawabox.com/lesson/1/15/example

and keep all your dots small.

edit: don't try and deform the ellipses to fit. smooth and confident regardless of if you hit the side lines of the plane.