There are already a lot of good written guides and good produced videos about Mastodon and the Fediverse. Therefore, this page only holds a curated list of the work done by others, to give you a broad overview about this topic.
- https://robbmontgomery.com/mastodon-a-quick-start-guide-for-journalists/
A complete guide about starting with Mastodon by Robb Montgomery. Topics are: finding a server, profile settings, authenticating your identity, profile security and more. - https://youtu.be/S57uhCQBEk0
A 7 Minuit Video by Simply Explained explaining the wider structure of the Fediverse and some of its fundamental paradigms. - https://fediverse.space/
An interactive map of the instances making up the Fediverse and the connections between those instances. - https://fediverse.info/
- https://fediverse.party/en/fediverse/
Basic information about the Fediverse. - https://blog.joinmastodon.org/2018/08/mastodon-quick-start-guide/
Kind of an official quick start guide from the Mastodon project blog. - https://axbom.com/mastodon-tips/
10 very useful tips for Mastodon