Thank you for the feedback. Upon reflection, I realized that when I was drawing the boxes, I was primarily considering potential locations for the vanishing point without committing to a specific placement in my mind. Consequently, the lines in my drawings generally follow the same direction but do not all converge towards a single point, as you explained. You can see an example of this in the image here: [https://imgur.com/a/UhnxT9Q]. In this image, I made a conscious effort to select a specific vanishing point for each side of the box.

Regarding the 50% rule, I don't meticulously track the time I spend studying versus playing, but I do ensure that if I dedicate time to studying, I also allocate time for play, and vice versa. Additionally, I have already watched updated tutorials on drawing boxes, feeling the need for further guidance.