You want to fire up a Mastodon server because I presume you're concerned with the loss of free speech on that platform? Do you think it was free prior to Elon's acquisition? Or are you only concerned about one particular type of speech when it comes to free speech?

Twitter failing to live up to tech utopian ideals in the face of their platform being used as the medium for a real life attempted coup is one thing.

Leaving free speech in the hands of Musk is another thing entirely.

I'm half expecting a freenode style implosion.

do you have recommendations on Mastadon servers to start with?

I'm not the one you asked, but it depends on your interests. It could also depend on what you're not willing to tolerate as defederation plays some role in what you will see.

What is "discovery" in this context?

The part of the lawsuit where each side gets to request specific information in support of their case?