Today I learned how to download and run your own copy of Wikipedia in it’s entirety. There’s a lot of information out there but for my ADHD brain this was the first video I found that was the simple and fast to get started. After watching it though, all I really needed to know was a place to download ZIM files.
I didn’t download the kiwix client as suggested, because I came across a way to do it as a server on Ubuntu:
First install: sudo apt install kiwix-tools
Then run the server: kiwix-serve -p 8080 your-zim-file.zim
And go to it in a browser: http://localhost:8080/

There are other ZIM files on that site I will explore at a later date. Interesting stuff like books and how to fix things…