Out of curiosity, I tried joining Mastodon and I kinda love it! The community is 100% pleasant, even if you venture out into the general feeds. And there's enough of a userbase where I'm getting a steady stream of interactions and people discovering my art. And it's so comforting not having to deal with the ads, trolls, algorithms, cloutchasing, ragebait, NSFW-bans, and all the other crap plaguing corporate social media at the moment.

I've been drip-feeding my portfolio of art to https://meow.social/@buffalonickels (or specifically @buffalonickels@meow.social - to follow me properly, make an account on any server, then copy/paste my full username into your search bar).

If you don't have a Mastodon account or heard the service is complicated, it really isn't. I had no familiarity with Mastodon but was up and running in minutes. All you have to do is find an open server, make an account, and start posting/following, just like any other social media service. People can follow each other no matter which server they're using, and if it's ever needed you can change servers later without losing your followers. So don't worry about finding "the popular server" or one that "looks perfect for you". You can just dive in.

A very nice big server list is available here. https://www.furryfediverse.org/ It also has recommendations for phone apps, although honestly the 1st party Mastodon app works fine by me.

I am not an expert on what servers are out there, but here's a quick list of nice-looking and probably-relevant-to-my-audience instances I was able to drum up:
https://tiggi.es/
https://vulpine.club/about
https://pettingzoo.co/
https://thicc.horse/
https://this.mouse.rocks/
https://social.tigerstyping.com/
https://chitter.xyz/
https://bear.community/
https://snaggletooth.life/