Really, it depends on what you think you want to do. We have a breeding farm here and are on 10 acres, so you're not going to be riding wildly chasing cattle, but you would learn about foaling, training foals/weanlings/young horses, Arabian horses and Arabian crosses and you'd learn Americanized English.
Write some farms and find one that suits your personality, and will help you accomplish your goals. You just might have to do a lot of letter writing and e-mailing to find just the right one. Good LUCK!