Keep your acetabularfemoral jointlaterally rotated. Make sure your feet are turned out as much to the side as possible, like a REAL ballerina). This is a right Pirouette so you will be turning on your left leg but going in the right direction. Your sinster leg should be in the front and your dexter leg is a few feet behind it. Your right arm is flexed which should look like half of a circle, and the left arm is abducted. Keep your elbows up in line with your arm, you don't want them to look like dead chicken wings. Keep your fingers soft and graceful. Also be sure to keep them in line with your arm so they do not come into ulnar deviation or radial deviation. Make sure your hips are squared off and you are focused and in the right mind set to make it the best Pirouette.
Simultaneously, flex your knees and with your right arm into horizontal abduction away from the body.This is where your momentum comes from. Do not use too much force as this is a single Pirouette. A double or triple Pirouette takes more skill and more force to get you around more than once. Keep your eyes focused on something straight ahead of you because when you go to turn you are to snap your head around and when you get back your eyes should be on the same spot that you were looking at when you prepped for the turn. This helps with your balance so you don't become dizzy or off balance. Be prepared to do a 180 turn and then to finish a 360 turn.
This is what it should like after you use your momentum. Keep in mind all of this happens fairly quickly. Your right toe is pointed to your left knee with your hips squared off, and you are on relevee (on the ball of your foot with your left). Your left arm has met your right ,like you are holding a beach ball. Your right hip is still externally rotated and keep the pelvic girdle completely still; it should not move, forward, back, or up.Your knee leads your turn around the circle, so think of leading with your knee and keep it pushing outward until you land. You need to stay on the standing leg as tall as you can with great posture as if a string was pulling you from the ceiling.
Keeping that same position for a split second (doing a 360 turn) you should be getting prepared for landing and looking for your "spot". You should finish the pirouette in the same spot that you started from.
Softly land from the ball of your (left) foot, rolling down onto your heel. Use your back (right) leg to gently stop your turn (like a kickstand). Make sure your weight is distributed evenly with a soft knee bend to help catch your turn smoothly and to help prevent injury. Your left leg shouldn't have moved, it just turned in a 360 circle.