Pony Play for the New Pony or New Trainer

There is a call for many to be a human Pony or to own, train and care for a Pony. How do you start out? How do you see to the needs of your Pony? How do you bring to life these fantasies you have? How do you make it real? How do you create perfect scenes and get what you want out of being a human pet or trainer? How and where do you shop for the stuff?