There are right ways to assemble it and wrong ways. I accidentally split the end off of one of the cross beams while putting things together early on before I'd made the braces and had to replace the cross beam. It happened because I put too much force on one of the ends of the cross beams while the posts were attached but the braces weren't.

Having a partner helps but isn't necessary. They key is to assemble the chupa in order and to attach things snugly so that nothing gets put under unnatural strain.

Before proceeding, I suggest attaching the braces to the cross beams first. This way, you only need to assemble one end of each brace while you're putting the chupa up, and you don't need to go looking for any braces or bolts while you're working. If you are annoyed that this means the braces swing around, tape them to the cross beams with masking tape.

With that done, go on with the assembly.

First, attach one cross beam to two posts and brace it to them. Lay this piece flat with the cross beam underneath the posts. If you followed the previous step you may have just done this.

Second, attach cross beams to the sides of each of the two posts and let them lay flat at the sides of the posts. If your braces are already attached to the cross beam and you made angled ends to your braces, make sure to attach the beam so that the angle of the braces line up with the post. Again, this is purely aesthetic and does not affect assembly.

Third, attach another post to each of the cross beams that are laying along the sides of the first two posts.

Fourth, attach a cross beam to the two newer posts.

You will now have a square lying flat on the ground, with all posts connected to two cross beams each.

Fifth, brace the cross beam that is on top, facing you to the two posts to which it is attached.

Sixth, gently and evenly lift the braced cross beam that is on top upward. The posts attached at each side should slide forward as you lift.

Seven: Once the cross beams on the sides are at a 90 degree angle to two of the posts, brace the two side cross beams to these two posts.

At this point, there are only two corner joints that aren't braced. You can gently lift the cross bar on the bottom and stand the whole structure up. Remember that the joints should all be snug. They don't need to be very tight, but if they are wobbly, the structure will twist and one of the unbraced corners might break under the strain. If there isn't much wiggle, the structure will stand up easily on its own. You can then brace the remaining two corners.