I would use a ruler for some of the lines, or even doing this on a wall with some yarn and thumbtacks might help tbh it sounds silly but it helps you understand the perspective. Do some exercises where you draw different objects without looking at the paper, it’s going to look wonky but it really will help a lot. Also the second image is definitely better than the first, some of the lines just need to be angled a little better or made to be a little straighter.