Once you get a solid tone, play 4 and 8 count note counting slowly to build you strength. After about a month of daily practice you'll notice the whole thing gets easier to handle. You can relax your lips, hands and shoulder tension (you may not notice that you were tightening so much). Be sure to push the air up from your lower abdomin (diaphragm). Don't fill you cheeks with air trying to blow like extinguishing a candle. That way the only thing your mouth has to worry about is properly forming your lips about the reed and tonguing notes (using the tongue to "te" out single tones).

Bombardes or Zurnas, whatever you want to call them are like any other instrument you are learning. Say like a drumset. You may be subject to ridicule and intolerance while you are learning it. Try making a blanket tent in your room to practice under. 2 chairs back-to-back with about 3 feet of space between, through a blanket or 2 to make like a little cave. You scoot into the opening and play your head off (if you can do acoustic panel or something fancy like that, more power to you). Whatever you do, don't let people discourage you. Ancient art forms and musical instruments have survived because we keep them alive.

Yes, in the hands of a spastic amateur, the Bombarde can grate on you like a squeaking chaulk board, but hold the line (and the notes). Strengthen that armature and pretty soon they'll be asking you to play a jig at your local pub or charm a snake. Throw a little Coltrane in there and you'll rack up the cool creds.