I don't understand why anyone would want to make the same mistake all over again: jumping onto a private platform owned by a company inevitably results in you becoming the product sold and enshittification. We've seen it so many times. Learn the lesson. Use Mastodon this time.
Also Mastodon is on the road to enshittification since the previous CEO and founder bowed out for $1M using donations and the main instance federates with Meta's Threads.
The other instances are out of the question since one rogue instance owner can lock and shutdown that instance.