Make sure the hoop you have is the right size. When you stand the hula hoop on end, it should reach about midway between your nipples and your stomach. If it is shorter, you will find the hula hoop difficult to use.
Step into the hula hoop. Put it down over your head until it is around your waist. Hold it with both hands. Press it against the small of the back.
Turn the hula hoop by throwing the hula hoop around and back behind you. Shift your weight forward as you do so, then shift your weight back so that the hula hoop continues on in front of you.
Keep shifting your weight forward and back to keep the momentum of the hoop going. Retain your balance by holding your arms up. You may find that you are able to make only a few revolutions with the hula hoop at first. With practice, you will be able to keep the hoop up longer.