Putting my horse into cart?

You really need to hire a professional trainer to teach her to pull a cart. There are so many things that can go wrong and injure you or the horse that it is not worth it. A friend of mine had been doing cart for years and did shows and weddings she decided she was ready to train a horse herself to pull a cart, she ended up flipping out of the cart backwards when the horse spooked, breaking her back, and the horse broke his leg and had to be put down. Don't make a stupid mistake just because you do not have the money to have a professorial trainer. For you and your horses sake try something else until you can afford a professional for this task.