Holy Mother of God Elfguy, are you signing yourself up for the raping of your life? Lol, but seriously, that is a good CS Sheet and I applaud you for your bravery, or your stupidity, I can't decide which, when dealing with two demons like my and Shadowsteel's lol. As far as elves and all that, go for it. It's fantasy, so let your imagination go free on that end. Anyway, go ahead my friend and have fun.
EDIT: Also, I don't know all that much about D and D, but I know R.A. Salvatore. Anything 200 plus I think if I remember correctly is considered adulthood for the silvan folk, or elves as the more common people would call them lol. So your age I would say is teenager going on very young adult, which isn't a problem really. Power wise, don't be expecting to win against a creature far older than yourself is all I'm going to say on that. Just so we're clear of course lol.