My pony is 9, what groundwork should I teach her for jumping?

So, my pony should definitely be able to start jumping; (fyi she is 12.2 hands) I have waited a long time to make sure all her bones fuse. She is very muscled and I have still been working with her, but I would like to teach her how to jump. She does have a good jump and can clear 2 ft easily. She also dosen't spook at anything! What groundwork should I be teaching her to help her reach full potential?