Hey there,

I'll post my initial critique to your submission below and elaborate on it:

• Many of your boxes have parallel or even diverging lines, try choosing a vanishing point that is closer to the box or even somewhere on the page, that makes it easier to actually get your lines to converge properly.

• You should be taking more time constructing your boxes, most of them seem rushed. You extended some of your lines in the wrong direction and crossed them afterwards, don't do that. If a line went wrong so be it, do not redraw or cross over lines.

• Your hatching is kinda messy, take your time and ghost straight lines from one edge to the other side of the plane, at some boxes you even scribbled a messy line across the plane. Hatching is optional and makes your boxes read better, so if you decide to hatch a plane, do it tidy and take your time. I recommend always hatching the plane that covers the inner corner, that makes your perspective read better

• Do only hatch in one direction, do not cross over your hatching in multiple directions

• I see some degree of wobble in your lines, so take your time to properly ghost and plan your lines, only then do a confident stroke from you shoulder, that is even more important to getting the lines right (confidence > accuracy)

• Your did a good job of identifying mistakes yourself, gave each box it's proper space and used multiple colored pencils for the different directions, good job!

Overall the most important things you should be working on is that in almost every single box of yours there is at least one side of lines that is parallel or diverging instead of converging. Try following this step by step guide to improve upon that: https://imgur.com/3zoQA65

Also your hatching is very messy, so if you are deciding to do hatching, try being more tidy doing it in the future.

I think if you draw some boxes from time to time as warm up and keep those points in mind, you will definitely see improvement!