Starting with your lines, you've fraying in both ends. When starting a line, you should carefully place your pen on the start of each line, so only a maximum of 1 end can fray. Plan each stroke you make carefully.

Lines look mostly confident overall, but they have a bit of wobble:

In these exercises, you should always prioritize confidence over accuracy.

A wobbly line will always be worse than a confident line, no matter how off the confident line is.

If you take a look over the ghosted lines notes you'll see the levels of lines:

Level 1: Line is smooth and consistent without any visible wobbling, but doesn't quite pass through A or B, due to not following the right trajectory. It's a straight shot, but misses the mark a bit.

Level 2: Line is straight, smooth and consistent without any wobbling and maintains the correct trajectory. It does however either fall short or overshoot one or both points.

Level 3: Line is straight, smooth, consistent without any wobbling. It also starts right at one point and ends exactly at the other.

As you can see, wobbly lines aren't mentioned, which means that they would be worse than level 1.

Ellipses are a bit wobbly. Remember that in ellipses as well as lines you should try to do them as confident as you can, don't hesitate in sacrificing accuracy to get them smoother and more confident.

On funnels, dont' forget the minor axis should cut the ellipses in 2 identical halves. Aim for it.

Boxes are mostly good, but they have some added issues:

First is that you're repeating lines, no matter how off a line is don't repeat it. Keep going as if it were correct.

On rotated boxes, some of your boxes weren't actually rotating, careful with that, this mistake is explained here.

On organic perspective, on't forget to draw through your boxes. You should be able to see the boxes, even if they're covered by other boxes. You can add lineweight to clarify their relationship on the line overlaps after.

I recommend trying more overlaps on organic perspective as well. You can clarify after the overlaps by adding a confident, drawn with the shoulder superimposed line on the part of the silhouette of the boxes that overlap. Perspective on them has issues but you'll work on it on the box challenge, so don't worry about it!