I'm going to critique this on a page by page basis:

I can see you've been doing the exercises digitally, while that's allowed, I feel like you would find it far more beneficial and actually easier doing them on paper.

Super-imposed lines

For the most part on the initial superimposed lines it looks pretty good. The fraying is only on one end for almost all the lines except for one. Remember fraying on both ends is a sign you aren't taking enough time to position your pen correctly while fraying on one end (the one your line finishes on) is perfectly fine and will improve over time. Your lines do seem to be arcing a little bit though. This might happen because you are not mostly using the shoulder pivot. But

it can also happen when using the shoulder and in this case it can be fixed by trying to arch consciously to the opposite direction.

Ghosted Planes

Your lines aren't wobbling, they are pretty smooth. Exercises like these you are going to want to be using as a warm up for when you do other more difficult and complex exercises throughout draw-a-box so you will get better over time with hitting both points more consistently.

Ellipses

The overall shape of each ellipse looks pretty good, its something people can struggle with but you seemed to have got it down. However, you do really want to be touching the sides, having the ellipses touch the sides of the space they fit in. You seem to be having just a little bit of trouble with your smaller ellipses, It looks like you might have been rushing them just a bit. Try to keep up your effort with these ellipses too, trying to be just as confident with your lines - ghosting as many times as you need - the same rules apply for these as the bigger ellipses.

Ellipses in planes

The general shape of most of your ellipses look pretty good here. The objective of the exercise is to touch the sides of the shape, not distorted to fit the shape (not an egg), but an ellipse that touches the sides of the plane. Your ellipses do seem to be pretty ellipse shaped only a few distorted ellipses, but most of the time they don't touch the sides.

Funnels

You want all you ellipses to be touching each other and on one of your funnels they aren't aligned. That line that you draw down the middle of each funnel should be able to divide each ellipse symmetrically.

Two Point Perspective

Not much to say on this, looks fine, can't really improve on this one unless you misunderstood something but you seem to understand the idea.

Rough Perspective

You lines seem both slightly better and slightly worse here. I can see a little bit of a wobble to your lines but a lot of them have lost the arc so that's good keep going. You don't hit both points when ghosting but that'll improve its completely normal. You also seem to be getting pretty close to the point so well done!

Rotated Boxes

Looks great, not perfect but really good for a beginner. You'll see after you do the 250 box challenge you'll improve loads on this and you'll get more instructions on how to do this better.

Organic Perspective

Your definitely overlapping which is important. Looks good!