I always feel that the very best way to approach your first dance is with a smile on your face. By that I mean that whatever you decide to do, it's important that you're comfortable and the moment can be enjoyed. Never feel pressured into putting on a show with a choreographed routine if that's really not your style. A two minute shuffle on the dance floor is absolutely fine, and before you know it, you'll be joined by everyone else anyway. If you do however decide to put some work in for a choreographed routine... remember that it should still be a fun moment and the images will look much better if you're smiling in them. If you're deep in concentration it may look like you weren't enjoying yourselves and if you do make a mistake, it wont matter if you're laughing anyway.