help!! jerky launch.. rpm drops

2011 Nismo#91

Starting in first gear:
Very slowly, begin to lift your left foot off the clutch as you press down on the gas pedal with your right foot. This is called "slipping the clutch," and it can take some practice. Ideally, this will be a gradual, smooth movement, and it will result in the car gently rolling forward. In reality, you can expect to stall the car a few times or lurch forward suddenly as you learn this step. All it takes is practice. If the car stalls, return to "Start the Vehicle" to restart it.
Remove your left foot from the clutch and continue driving until the tachometer indicates that it's time to shift to second gear.

Your rpm drops because your are putting a load (3,300lbs) on the engine as compared to idle where there is almost no load on the engine. As your clutch engages more you'll need to give more gas to keep the rpms up and keep from stalling.