Without rigging or a gantry you would likely not be able to do it yourself. Think of what you would want were you constructing this out of long thin toothpicks outside: a gust of wind would move things out of alignment and you would have to leave your current spot to go readjust, that would still happen with the thin aluminum stilts/arches/siding.

That being said if you approach it with that in mind and are prepared to make hangman-style small gantrys or arms to hold things in place while you get to the spot to secure them then you could probably do it on your own over a few days.

If you don’t have the instructions don’t try to build it from nothing, go look for the same model online and find instructions so you can tell which bolts go where, and to get an idea of what brackets, holding arms, and loose tie-downs you would have to make and use to align things while you move yourself, tools, and ladder around the structure.