I would suggest contcacting a few guides/outfitters and begin getting a feel for what questions you want to ask, what various outfits offer, that kind of stuff. There is no one guide fits all. Do they hunt trophy animals, average game spotted, success rates? What type of lodging, meals? Do you hunt by horseback, walk in...
Lots of things to figure out before you know what you want to do. Be specific and up front about expectations.