I have a website full of tips about how to use Mastodon and the Fediverse:
➡️ https://fedi.tips <---- Click here to open the website
It's all written in plain non-technical language, and aimed at a general audience. There's a section at the top with quick links to the most essential tips, and a complete list of guides below that.
If you can't find the answers you need on the site, ask me and I'll reply. :blobcat: