Really it just takes time and a lot of mistakes. But to get you started. Buy a simple box call because they take little to no practive to use really. Get out to you spot right as it is just getting light and just listen. If you hear two of three different toms sounding off head it that direction. The important thing to remember is if you can see them they have already seen you. So don't get too close and be stealthy like a ninja. Their eye are about the equivalant of us looking though a decent pair of binoculars. They see color so don't wear camo with a bright yellow under armour sign on it, and make sure you have something covering you nose and eyebrows, they tend to shine more than the rest of the face.

Once you get to where you think you are close enough but not too close sit down and be quiet for 15 mins or so. That way if they did catch movement or sound they will forget about it. The will gobble like crazy while they are in the tree and then shut up right before they fly down. that is where Decoys help. For just starting out I would just put one lone hen out. Only call enough to get their attention and when you know they are coming your way get your gun up, shut up and don't even flinch. It sounds pretty easy right? That all being said it would be nice if you have a friend that knows a little about it to take you out for the first time. They really are stupid birds but their eyes are something that will amazing even the most season beard hunter.