Hey people new to Mastodon!
Did you know that Mastodon is part of a wider network called the Fediverse?
These (and more) are on the Fediverse too:
PixelFed - an Instagram alternative (https://pixelfed.org)
PeerTube - a YouTube alternative (https://joinpeertube.org)
WriteFreely - a blogging platform like Medium (https://writefreely.org)
Lemmy - a Reddit alternative (https://join.lemmy.ml)
You can follow Fediverse accounts from Mastodon, because Fediverse platforms talk to each other.