1. Hold the saxophone with your left hand and your right hand. Your left thumb should rest on the thumb rest and your fingers should be placed over the keys. Your right hand should be positioned with the fingers curved over the keys.
2. Place the fingers of your left hand on the keys, covering the first three keys from the top (also called the palm keys) with your index, middle and ring fingers. Cover the side key with your thumb.
3. Place the fingers of your right hand on the keys, covering the first three keys (starting from the bottom) with your index, middle and ring fingers.
4. Blow air into the saxophone while pressing down on the keys you have covered. You might need to adjust the amount of air you blow and the pressure you apply on the keys to produce a clear and in-tune A note.
Remember to practice regularly to develop your embouchure and finger technique, which are essential for playing the saxophone effectively.