Hi! I just recently finished lesson 1 myself, so take the things I say with a grain of salt.

I'd say you're mostly doing well on these exercises, but obviously no-one's perfect.

Superimposed lines:

Fraying of the lines on the other end is fine, but you should be careful not to have any on the beginning end of the line.

Ellipses in planes & funnels:

I noticed that a lot of your ellipses are undershooting the edges of the boxes and funnels (not horribly but still), mine aren't perfect either but what seemed to help was to start ghosting the ellipses in the planes with a sort of diamond shape with the corners being at the centers of the sides of the planes. After you can ghost the diamond shape and hit all the sides, you start softening it into an ellipse, if that makes sense?

Rough perspective:

Be careful to keep all the lines going where they're supposed to. Some of the lines that are supposed to be vertical (this is "2-point" perspective), are a bit crooked. Having the vertical lines be as straight as possible also helps with getting the other lines.

Rotated boxes & organic perspective:

In the rotated boxes excersize it's crucial to keep the boxes consistent on all sides. In the organic boxes exersize the perspectives aren't very consistent. You should think about what point of each box is the closest to the viewer/ camera to help with figuring out where the vanishing points for the boxes are.