Hi!

Overall you've done a pretty good job. The lines are confident. The extensions are in correct direction and the hatching shows the nearby plane correctly.

Just try to draw the hatching less rushed so that it doesn't go outside the plane you're drawing it on as doing so breaks the form of the box thus damaging the solidity.

Just keep this in mind for future boxes and as such i feel you have understood the aim of the lesson and hence you may move forward.

Good luck! O~O

(Also thank you for helping others by doing critiques)