Never stalk! Strike a gobble, move in to set up and park yourself and call him in. Besides another hunter, stalking will blow more hunts them calling one in. If a gobblers is sounding off, hens are not far away. Learn to call them in that's the pure fun of turkey hunting in the spring.
As for calls, easiest to learn is a box, slate/glass friction call, then mouth. You can never have too many calls. I've had bird go silent then pick up a particular box call and start gobbling his head off. So have a goos call arsenal.
Mike