This desk is mainly to ask for help and guidance.
Main talk is at https://matrix.to/#/#fedijam:m.wfr.moe  
For people new to Matrix: you can choose both which server is to hold your account info and which client you want to use. The above matrix.to link offers some options. Registering on some servers (like m.wfr.moe) does not require email.
Servers are interconnected, you can join our room from any.

You can also follow the news on #fedijam tag (it is not twitter, but mastodon).
If you want an acc to write posts, it follows the same route - find a server, register, and you can access all of the network.
There is a nice site to help you choose https://joinmastodon.org/

(Disclaimer: none of this is complete, exhaustive, or even very accurate. Fediverse is a complex social and technical phenomenon. The rabbit hole is deep, and we... we are on a cut budget.)