You will spend a lot of time getting the call to sound right.
Do not blow the air, instead huff it over the reeds.Use the air from your lungs by squeezing your stomach muscles and forcing the air out. Vary the tongue pressure and you will get different sounds. Constrict the air over the call by closing down your throat and increase it by opening it up. This will also create different sounds. A higher pitch and a lower pitch.
Put all this together at the same time and you will sound as good as Adrian in no time!!!LOL