I'm interested to know if anyone's using Mastodon for discussing research / scholarly publications. Equivalent of people sharing / discussing articles on Twitter.
1. Search for a mastodon instance/server which might already cover this community, and then join up. Besides searching for servers via google, you can visit the following "Join Mastodon" page, and search for a server: https://joinmastodon.org/#getting-started
2. You can join almost any mastodon server, and then search for and follow users - regardless of which server they actually "live" on. Much like the concept of email, you can follow anyone, regardless of their "home server". I think someone else here has already stated, that in masotodon, you follow people, and not necessarily servers/sites.
3. You can set up/run your own mastodon server/instance that would focus on "discussing research / scholarly publications"...Again, you will eventually gain a following of users who would be interested in your topic, even though they won't need to live on your server.
I hope that helps!
EDIT: Not sure if it was clear, but in my option 2 above, my assumption is that you could follow users who would be interested (and perhaps already involved) in "discussing research / scholarly publications".