@impressdivinity welcome, friend!
Mastodon is similar to Twitter, but with less bigots for the most part.
New users typically like to post an #Introduction, littered with hashtags that are related to their interests so others with similar interests can find easily.
There's many other platforms on the Fediverse besides Mastodon, so if Mastodon doesn't suit you, you can always ask for recommendations for a different platform using the Fediverse hashtag. I'm sure someone will help out.
I hope this helps.👍