Install your own instance
https://www.linuxbabe.com/debian/install-mastodon-debian-server

The instructions don't look too bad for Linux people, but the $4-8 per month is too much for a retired guy. Maybe IPvanish will provide this one day for $1 per month, but I'll have to give up one sip of Scotch per month. I will miss the good Doctor, but he's hiding lately. Maybe he's somewhat bipolar like I am. :)