This account has a website full of tips and step-by-step guides about how to use Mastodon and the rest of the Fediverse:

➡️ https://fedi.tips <-------- Click here to open the website

The entire site is written in ordinary non-technical language, aimed at a general audience. There's a section at the top with quick links to the most essential stuff, and a complete list of guides below that.

If you can't find the answers you want on the site, ask me and I'll try to help directly.