Place your decoy up-wind 10 to 20 yards. When you see a coyote, go quiet and let the decoy do its work. If the coyote slows or loses interest, make kissing sounds to it in order to get it back on track.
To use the call, you do blow into it but with some feeling. Imagine a baby crying and that is the soft stuff. Imagine a toddler having a raging fit and you are getting there. Remember, you are trying to mimic a rabbit fighting for its life. The individual cries are generally one to three seconds. A series of cries can be 15 seconds or until your air runs out, that is up to you. A stand can be from 10 minutes to a half hour.
It takes about a half minute to understand how to blow the call. Don't puff your cheeks, blow from the diaphragm and use your hand to manipulate back pressure and muffle sound. Again, when you sound like a bunny being pulled in half with salad tongs, you have it pretty much down pat.