Not shooter (online game like (simple) Hay Day) (Main Server) NOT rooms)

Hello)
I want to make an online game. Not shooter. I do not need a games room. It should be similar to the farm. Where you can see the ownership of Facebook friends, help your friends, etc.
I do not understand how to do it. All lessons are only about shooters!
Where do I begin.
And where do the server.
And then his host?
Sorry for my English)

There are a lot facebook SDK’s like photon has own FB SDK. You should take a look at it