the thing is, before you jump in, know that they play mafia in reverse.
You do NOt know the roles. You ARE allowed, and are often expected, to infodump.
Knowing when and how to reveal your info is part of the art of this style of mafia.
Not knowing the roles, the mafia has to wait to see what the townies start to hint at about their roles and then try to lie about theirs, as once the mafia's theme is revealed when one dies, the rest would get screwed if they had used their real roles.
Anyway, let me know ASAP if you are interested and I'll parachute you right in! We don't normally let brand new members play to avoid cheating by members etc. but I would obviously personally vouch for you, and it's my game anyway
Oh, and one last bit of color... there are some post restrictions out there. Let's just say that one guy is Groot. All he can ever say, the entire game, is "I am Groot".
