The gameplay guides and AARs section has a few faction guides to help you through the first few turns, they are for earlier versions but should still be relevant.
Apart from that reading the forums here, many a time I have come on with a query and found it had already been answered and the FAQ is good, and actually playing the game are the best way to learn the little differences in EB. The Romani are probably the best faction for a newcomer with its good economy and easy to use army.