Get in the best shape that you can, because elk hunting, for the most part, is much MUCH more physically challenging than whitetail hunting is. Plus, most likely will be at much higher altitudes then you, as a flatlander, will be used to.
Depending on which season you're hunting, you may or may not need to learn elk calling. Rifle hunting isn't as reliant on calling as archery or ML hunting is.
Main thing is get in shape. Can't stress it enough.