I don't this is Under the Correct Topic but its
To chat in game with Text its T
and Voice Chat is V by Default if servers Have it Enabled
and you add people on the Forums By Following them and them Following you back
if you're in game while this occurs you May need to restart for them to appear in your friends lists
Yes im aware that I Answered your question in discord a few seconds ago I already had this typed out and you may use it for future reference have fun and Welcome to pluto 😄