Be patient with yourself. It's kinda scary to run the machine for the first time. You'll probably find that you'll be holding your breath and that will make you tense up, so if you catch yourself doing that take some deep breaths to relax yourself. Try to keep your movements smooth and easy and don't try to "drive" the machine with your wrists. If you find that you are gripping the handles really tightly, and that will cause your movements to be a jerky. Give yourself time to get used to the movement of the machine and how the process feels. In a way, it's like driving a car for the first time. All will get better with time behind the wheel.