I started to play WoW with the release of Cataclysm, without friends and not knowing anything about the game and lore but some stuff from the GamesCom flyers etc. and it wasn't a problem to learn it, you really should start with a level 1 character even when people are saying it's outdated content or so, you will be overwhelmed (as I was when logged in the first time :-D) how big all this stuff in Azeroth is and you will find funny things from time to time that it makes you almost forget which level you are and BOOM you're 110.
Happy leveling!
ah and btw, it's never too late to start.