https://landchad.net
If you're looking to host your own sites, services, etc. using a Debian GNU/Linux server (either a VPS or a home server) Land Chad has a few guides that are concise and easy to follow. I've used it for a couple things.
If you have any other resources for self-hosting, please share them here. I'll update this post with more resources in the future.
Oh my gosh thank you for this genuinely!! <3
https://comfy.guide/
A site I found recently, more than just self-hosting guides but general computer stuff as well. Minimal in nature and easy to follow.