Q1: complete shot in the dark here but I have an laptop with a i7 and some Radeon graphics it runs 17fps on medium, so probably you are gonna have 28 or something ( do not take this as a fact)
Q2: they are exploring dlc’s and probably looking how good the base game will do
So there are no things set in stone as far as publicly known
Q3: you can go to the discord to ask random people, but it is not possible via the game it self