Try a rubber bit first. If she rejects the bit, put a little molasses on it and gently try to get her to take it. If she takes it in her mouth, don't rush to put the head piece on. Let her investigate the bit, and then when she's comfortable, slowly slip the head piece on. Everyday let her sit with the bridle in her mouth under your supervision and then you can start teaching her the turning and all that.
Never ever start your horse off bad with something, because it will then be likely the horse will have a problem with that thing later on.
*~ THE HORSE STOPPED WITH A JERK, AND THE JERK FELL OFF -- Jim Culleton ~*