Keep seeing comments from people along the lines of trying to get "how Mastodon works" and my advice is just relax. Mistakes are cool and normal!
Also loud shouty people may come at you for doing things "wrong" but their rules are not necessarily yours and that's ok. It's hard to go really wrong if you're not a terrible person.
Folks get very protective of their communities. Things will settle. Ask for advice freely but don't assume the first answer is the only one.
Breathe. You're OK here.
Consider this a friendly, local pub. Make yourself at home, bring your friends, have a good time! Meet new people, have a laugh, enjoy the ambience, and the Oxford commas.