>>278542412
there's a button in the game menu to do matchmaking, which just groups people up into a lobby and then you can vote on a gamemode. The entire game population will likely be <6 so that works. There's also private lobbies but you have to be friends on ubisoft's shitty client so it's more hassle than it's worth.

You might have to play through the tutorial first to do multiplayer, so go through that if you haven't.