Tutorial for creating a Room for a multiplayer experience

Hello,
I have ordered an Oculus Quest as I would like to create a multiplayer experience. I would like to know:
- Where can I find a simple tutorial to implement it in Unity? (the Social Starter App seems quite outdated and no much documentation about it)
- Do I need a second headset to test my app or there is a way to do it using my computer to simulate a second player

Ideally I would like the user to communicate over VoIP. 

Any help would be much appreciated.
Thanks.