New to networking, some informations needed

Hello Everyone,

my game is going to be some simple fighting game to start with over the network
but since I'm new to the networking I just want to make things clear for my own sack..

first I want to know if I can connect my game to an external server?
will I be able to make players to connect to the server and then in the lobby the player will be able to browse through rooms to join and play with others?

also if possible, where would you suggest is a good place to start?
I have already...

New to networking, some informations needed