is there a way to make a new account?

i havent made an account on my steam purchase of the game, but because ive logged into my account it says 1 per CD key, anyway, is there a way for me to make an account? as im not so good at this game, but my level 80 CIV makes anyone whos a rank the same as me think im some expert player, so im forced to play higher ranks. as the lower guys think CIV level makes a difference..... (i play aoe3 vanilla)