Possibly! It depends on what you've done in those 13 years. 13 years riding well schooled horses, or riding school horses is very different from 13 years riding young horses. If it's your first time schooling a green horse, I would highly recommend getting help from someone who has experience bringing on young horses and I would say that regardless of how many years you've been riding. It's a critical time to set good foundations for the horse's future career.