Well, here is the problem - you are new to modding, so much that this is your first post. And you want to create a highly developed map such as Rise of Civilizations. Of course, you don't know how, and that's fine. But I really don't think that anyone with enough skill and time will agree to make your ideas come true. You could ask someone to edit the map, state your ideas clearly, and see what happens.
The idea is nice, I liked recreating World Wars. I would definitely play as Serb :D