[HELP] Need advice on how to structure my RTS Multiplayer Game

Hello, couple days ago I've started working on a real time strategy (Age of empires style) multiplayer based game (Meaning no AI for the time) and I've reached a point that I'm unsure how to follow working. So far I've coded the basic stuff, like camera movement, selecting units and giving orders to the units, but all of this is multiplayer independent, meaning I haven't coded a single line considering multiplayer situations.

I'm not sure if what I've done so far can work as it is, or how...

[HELP] Need advice on how to structure my RTS Multiplayer Game