I am not a beginner on Unreal Engine, but I am (was?) a noob on using dedicated server. Of course there are a lot of tutorials on Multiplayer. The problem with most of them are:
- They use the listen server, which is really different to a dedicated server. A dedicated server has no graphical interface. So you need to get access to de server through a client.
- With a video tutorial you are just copying the tutor. At the end you still don’t understand what you are doing. (my experience)
So I started from zero. The things I am trying / doing / learning are shown and discussed in https://unreal.fluiddynamics.eu/dedi…r-for-dummies/
Maybe this could be some help for people with the same struggle 
In the end I am going to use my knowledge for https://unreal.fluiddynamics.eu/
Greetings from the Netherlands