dance

To know how to dance you need to know how to move with the beat of the music, learn the count of each step, you also need to be comfortable while you dance you cant be stiff and like a stick other wise it wouldnt look right and you would be able to tell that you aren't comfortable dancing.
You also need to have fun while your dancing, dont look like its something you were forced to do, show that its fun; smile.
You dont really need skills to dance, it takes practice to get it right. Balance is one of the main skills you need to have, you also need to get your steps and counts down for each step, make sure you know the beat to the music. If your just dancing for fun and not for a show or anything there really isn't a skill you need to know just move with the beat.
 If you miss a beat during your dance its hard to get back on track with the music because after you miss one step you end up going faster then the music.
some moves may be hard to get the hang of at first but if you practice and practice you will soon get the hang of it.