First, keep your body upright and your shoulders flat;
Then, don't move your shoulders, keep your head at a vertical angle and stretch to one side as far as possible. You can imagine that your body is fixed, with something on your head and your ears attached to objects on your shoulders. You can feel the tension in your neck muscles, which can match your eyes.
After that, change sides.
Repeated practice, I am not a dance major, but also watching others do Cheetos and practice in front of the mirror.