How do I create a Peer-to-peer game?

I am trying to find a good tutorial on where it explains how to create Peer-to-peer game by coding in C# also on where it shows a player connects to another player in their Unity game. I know a bit of stuff on how the Internet works and how data is transmitted through it, but is there a beginner friendly guide? I did code a game on Unity for myself but never created a two player game.

Start here


https://unity3d.com/learn/tutorials/s/multiplayer-networking