I got into it watching Adam Savage. The method he uses is really easy; glue & staples, build all 6 sides, cut off the top with the table saw.

One Day Builds: Adam Savage Makes Something Wonderful from Scratch https://youtu.be/-tUHJnl8qPM?si=d8eQ99XiqqKUzWRe

Here's a few of mine:

https://imgur.com/a/O9ybg

https://imgur.com/a/ChgDJ

https://imgur.com/a/U4XSO

https://imgur.com/a/e3ZG0

https://imgur.com/a/DMdMS