I wanted to do a simple game where you can shoot waves of enemys with an local friends and have deathmatch.
and your question? just some tutorials? well, the unreal-own are very helpfull (https://docs.unrealengine.com/latest/INT/Videos/ - for the multiplayerpart especially under “browse by topic” the “networking” tab) or take a look on youtube (e.g. tesla or just search for “unreal engine [theme]” - as I do ^^)