Is this possible?
Welcome to the forums. Rule #1: There’s no need to open more than one thread per topic.
It is possible, but… how much knowledge do you have about Unity and programming in general?
If none, I’d suggest you to read the tutorials in Unity’s Learn section.
» Learn
Yes it is possible. If you are just learning Unity, I would highly recommend not starting with a multiplayer game though, as they are considerably more complicated.