Hi there! Good job on completing l1! I'll go over the things I notice so you can keep improving:

First on your lines I can notice 2 mistakes. First is that you have a bit of wobble on your lines. 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.

Second is 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.

Ellipses are pretty confident in general, though a bit of wobble appears in a few of them. Remember here it's the same. Confidence > accuracy always.

Boxes in general look good too. There's a main issue though, which is repeating lines:

No matter how off a line is, don't repeat it, keep going as if it was correct.

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