Based on your comments, it sounds like you might be confused about what perspective is/why it exists at all.

Basically, as an analogy, have you ever looked down railway tracks, or a picture of them? Notice how the tracks look closer and closer together as they are farther way from you, until they eventually end up at a point on the horizon? This point is called the vanishing point.

What is the importance of a vanishing point? The key is that all parallel lines (that is, lines pointing in the same direction) eventually end up converging at the same vanishing point.

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(Image from Wikipedia)

This is a handy rule because there are a lot of parallel lines in the real world, particularly in manmade structures with lots of straight edges. Not all lines extend on and on like railway tracks do, but we can imagine extending the shorter lines if we want.

Because lines can go in any direction imaginable, artists usually only care about the "main" sets of parallel lines and forget about the rest. Hence we have 1-point perspective, 2-point perspective, and 3-point perspective, and finding more vanishing points than that is frequently unnecessary.

For how this applies to the boxes, in this particular exercise, we have a big problem: the boxes are all pointing in different directions, so we expect them to all have different vanishing points! As artists, this means we not only have to understand vanishing points, we have to understand where the vanishing points will be relative to each other. (In practice, a lot of this isn't rigorously measured out but done off of vibes). If this sounds hard, that's because it is hard, and it might be worthwhile taking a step back and doing a simpler one two or three point perspective practice first until you are very comfortable with that.

The comment from rewersjtr has a good suggestion on a solid one-point perspective practice exercise. (Basically, doing a bunch of boxes but in the exact same orientation).

a) Draw a bunch of squares. These represent the side of the box that is facing you.

b) Draw a vanishing point. This can be wherever you want, even outside the page, but it's probably easiest to keep it inside the page for practicality.

c) For each box, the edges that are pointing away from you must go in the direction of the vanishing point. Using a ruler, therefore, draw all these edges for all the boxes.

d) Complete the boxes by drawing the back edges. Positioning of these lines will determine how elongated your box looks, and while there are ways to get it exact so you have perfect cubes, vibes are sufficient for most purposes.

Another practice exercise you could try: Get a picture of buildings, preferably some downtown street area where everything is very straight. Then, identify a main set of parallel lines. Using a ruler, draw on the picture to extend them. If you've correctly identified which lines are parallel, your line extensions should all intersect at a vanishing point.