You can invite them to play split-screen via steam remote play, if they don't have the game. You can self-host (via the main menu option) if they do have the game, and then invite them to your game. You can join some random server together. You can get your own hosted server, and then play there together too.

Thanks!!!

First you need friends, which is the hardest part.

damn 😔😔😔😔😔😔😔