Hey there!
From the home screen, at the top shpuld be 'local@lemmy.fmhy.ml.'. You can also select 'all@lemmy.fmhy.ml'. That will show you a feed from everyone FMHY is federated with.
If two inatances you like block each other, you can get accounts on both. The entries have a 'via fmhy..' Or 'via sh.itjust.works' for whatever instances you have listed in your configuration. Long-press on instance name in configuration to delete it if you don't want it. I deleted lemmy.world, because I can just see lemmy.world stuff in 'all' via fmhy.
Technically, it's not federation, it's confederation, but we have some bad history with that word.
I use xonsh, which has decent history - start your command, and up arrow cycles through commands stating with what you typed.
There's good stuff and bad stuff about xonsh.