Tutorial for Multiplayer


sorry if that’s the wrong section, but I’m new and didn’t found a question section.
My question is really simple:

I’m want to make an asymmetrical horror game like Dead by Daylight. And I also want to use the multiplayer system like dead by daylight.
So my question is: Are there any tutorials for setting up an multiplayer system without servers on steam (I think it’s called Peer 2 Peer, if not correct me)?
Would be nice!