What intrument should I learn how to play? HELP!?

Ok, I am not musically talented at all. I am super athletic though so it makes up for it most of the time. I can sing decent, but I want to learn an instrument. I have really short term memory so it's hard for me to remember songs, pick up dance moves, etc. I was thinking about the guitar, but its so difficult for me. And than I thought about the drums, but I can't keep a beat. =\ I tried a harp, but I couldn't find a good teacher. I am really considering the drums though. What would be the best instrument for me?