Like Doom said, Abominable, you could check out a few other Civ games to see how they chose to do things.
Here are a few examples with some easy links for you - while some of these never got started/were put on hiatus, others have been finished or are still in progress, and they all could provide you with ideas of how to move forward.
Pandora Horizon (Survivle Civis Forum Game)
Pandora without Horizon - P.H. Second Season
Dead Game
Deos Sine Tempore (Forum Game)
Deos Mundum (Forum Game)
Thrive of Empires 2
The Dance Of The Gods (Forum game)
A Tale of Earth and Sky (forum game)
The Twilight Realm: A survival Civ Game
Forum Game-Pietravita
Vasarius: The beginning