Lidgren.Network
One skill which could improve your overall project complexity is using networking and multiplayer features. I will therefore just provide the information to use and not give specific examples and tutorials. Lidgren.Network is one method of introducing networking into your game.
Source Code
You can download the source code from this link: GitHub Code
Helpful Links
http://genericgamedev.com/tutorials/lidgren-network-an-introduction-to-networking-in-csharp-games/
https://code.google.com/archive/p/lidgren-network-gen3/
https://github.com/JonDouglas/MonoGame-Tutorials/tree/master/BasicLidgrenServer
https://github.com/JonDouglas/MonoGame-Tutorials/tree/master/BasicLidgrenClient