HGG Community Forums

In summary, the goal is to show horses to make money to fund your breedings. The FAQ should cover most of the technicalities, like RedDee said. Pretty much just browse around to see what horses you like using the horse search on the left bar under community, and decide what you want to breed for! There's a bunch of super pretty color combos available. General rule of thumb is about two or three show horses for every one breeder to make sure you're making enough money. For how-to's on breeding and showing, if the FAQ confuses you then don't hesitate to ask questions! This is a super friendly community.

Come join the beginner's barn buddy chat and lurk around for a while and ask questions :)
http://hj2.huntandjump.com/buddy_chat.php?chatid=12

The new achievement system Ammit just put in place should help walk you through some of the basics as well.