If you're from #Twitter with the #TwitterMigration, RIGHT NOW is the time to let your people know you're on Mastodon. Don't wait until that channel is shut off (if or when).
I absolutely do not know everything about #Mastodon but as quickly become an evangelist for it and the greater #fediverse.
If you, or anybody else you know, need assistance getting onboarded, just ask. There are plenty of friendly, non-judgmental people ready to help.
Keep in mind: THIS IS NOT TWITTER.