help for my mafia citizen game

first of all I want to do a mafia citizen game, but since I’ve just started software and unity, can you tell me everything from the beginning? first of all, how do I create players I mean that everyone should have different options on their own phone, for example, the night mafia phone screen to select the person they want to kill. citizens should not come out of anything on the teledon. how do I create the roles of mafia and citizen. After creating the game if 4 people are playing 1 person must be mafia, 5 people are playing 1 person must be mafia, 6 people are playing 1 person must be mafia, 7 people are playing 1 person must be mafia, but more than 8 people are playing 2 mafia. How exactly can I make the idea in my mind. I will be very happy if someone can tell me in detail from the beginning.

Hello.

What is a mafia citzen game? What means tell everything? phone? what phones? roles? which roles of what? what are you talkinmg about? how old are you?

Are you pretending that we make your game or what?