Unity Networking

Hello Unity community!

I’m using unity for over 5 years now. I’m very familiar with scripting.
Expect one thing…
I want to start learning the networking system. I want to create a network game.
I’m completely beginner on network scripting.
So i want to ask you friends, how did you get familiar and comfortable with unity networking?
What should i do and keep doing to become expert on networking?

Sorry for my bad English and thanks for your time!

With love,
An unskilled game developer

These are 2 good YouTube tutorials you could watch on Netoworking. I personally find PUN a lot easier to understand than UNET and easier to implement, though that is because I have a very limited knowledge on Networking myself and have not found the time to learn UNET and see the difference (which I imagine really isnt a great difference) between UNET and PUN.

So for PUN: Multiplayer FPS in Unity 3d, Part 1: Introduction & Project Setup - YouTube

For UNET: Unity 5 Tutorials - Includes UNET Co-op survival - YouTube