I wouldn't worry about the Ke Ke run call, we use that mostly in the fall. Get good at the loud yelp for locating, cutting and yelping to bring them in, purring and putting for bringing them in close for the kill.
Like what's already been suggested, start with the box, slates, etc, but I would get a mouth call and start working with it. Listen to the birds while your hunting them this season and try and sound like that. I like the mouth call the best for a couple reasons. When you're good with it no other calls can come close. Second, it takes movement to use slates, box or push calls. Once that big slob's with in eye sight so are you. A mouth call at that point is just what the DR ordered.
Get some good deeks. I like the love nest. a tom, Jake and a hen or two, make it a turkey party.