I've come across this sentiment in a couple threads so I thought it might be time for a separate discussion. Does a fear of experienced players and/or pro players keep you from coming online?
My advice is to accept that you have to take your lumps and pay your dues in order to become experienced and also to look over the player records before a game is about to start and politely request that the teams be balanced and mention that you're new to the online game. In my experience if you say that you're new to the online game players will try to balance out the teams.
Also, you guys can play the game online as humans v. computer until you feel a little more comfortable playing online. You might even try to set up some human v. human games with other people who are willing to play human v. computer. You could also title games, "New Players Only".
Another thing to remember in a team game is that you personally don't need to be winning in order for your team to be winning and you don't have to be elite to help your team. Even if you lose, try to enjoy being as annoying and as big of a pain in the arse as you can--delaying the fall of your empire and distracting your team's opponents helps your team. So, even if you get beaten when you're first starting out--try to enjoy the challenge of being a pain in the butt--enjoy the game as a team game and enjoy doing what you can to help your team.