Honestly, I wouldn't advise you to play online too much as a beginer. You'd be better off just working your way up in single-player difficulty levels for a while. That way you'll be able to take your time, read the civilopida as you go, and crank up the difficulty gradually and not get discouraged. If you absolutely have to play online you should probably stick to games that are tagged as "noob," otherwise you'll get killed pretty fast.
Still, the problem with noob games is you still won't have very much time to look stuff up in the civilopidia when you have questions, as online timers are probably only going to give you 20-60 seconds for most turns, which just isn't enough when you're learning. If you want my advice, wait until you can beat the game on Prince or higher, then you're ready for online.