According to multiple reports Civ7 seems to have been released 6h early, and is already available for download. Due to the download size we do not yet have reports if you can actually already play.
In case you can not, then you can still check out the game guide for the Mughals. They are an economic and expansionist civ with a starting bias for flat tiles. Their associated wonder is th Red Fortress, and they have a bit of a military focus. For more information please check here.