I can help you out with more of that!

deleted by creator

Right here?

Someone please do this to me!

You really only need one account. You can participate in conversations and communities across (pretty much) all servers.

1. Yes, it’s a different instance
2. You always subscribe to communities. They are hosted on one instance, but people across all instances can participate.
3. Different instances. Might have different rules for local content, look it up!
4. Not really.
5. Not sure, actually. It’s either all content posted to your instance’s community or all content posted by people on your instance. Maybe someone else can elborate?
6. I suppose all is also pulling content from all instances yours federates with?