What are the conditions to play?

You don't need anything exceptional from a hardware point of view except the console, the game and an internet account.

In detail, here is the list of prerequisites and hardware:

A player account (free) on the platform that corresponds to the game you want to play
The game itself (official) - Fifa for example
The console: Xbox, PlayStation, or even Switch or Mobile Phone
Or a computer in the case of games like Starcraft 2
An Xbox Network gamertag or an ID on PlayStation Network or a valid battle.net account
A computer or smartphone to connect to the betting platform
An email (a real address...)
A stable and permanent internet connection
The rage to win
An environment conducive to concentration for GG

So start by searching for the betting platform on the game you are interested in by navigating the menu on the right.

Alternatively, you can see the games available by console in the top menu.