/ic/ - Artwork/Critique

Hey, I have been trying to do the 250 box challenge, I am on like #80 or so and I am worried I don't get this. I understand the three sets of parallel lines and matching them up to a vanishing point far off the page, but I just can't get them to match up. I feel like it's taking me so long on each box that all I am doing is practicing on making good boxes. A bunch of people say that it's really helped them and they "finally started “seeing” scenes, characters and objects in perspective inside my head." but I am just not getting it.

Does anyone have any suggestions? And please no
>drawabox is trash
responses. I am looking for actual serious responses that will help me improve instead of crab shit.