You can ask them, but I don't think they will let you work with them without a practitioner. I think it's helpful to have someone who is following your progress consistently, who will respond when things are tough, and I can assure you that will happen! On Dr. Wilson's site there is a list of practitioners, I'd email them and ask if they'll work with you. Also email Dr. Wilson, he may know someone near you, and he's good at replying. What country are you in?