unity – The place to begin to make an internet recreation?

Im beginning to make a 3d recreation in unity. Im Simply doing this like a passion so im studying slowly. Im making an attempt to make an internet recreation however i’ve 0 information about on-line networking.
I will probably be very thanksfull if u can identify some matters that I ought to recognized earlier than making this. (I program in c#, ought to I be taught one other language to make this?)