If you'd like start by filling out your bio a little (otherwise it could appear a bit creepy). Post an introduction with e.g. the #introduction and #NewHere.
Highly recommend checking out this thread, even it's on another server.
https://mastodon.art/@Curator/109330938776710411
And give @FediTips a follow. Their site will probably answer all the questions you might have regarding the Fediverse.