The main thing is to learn to coordinate your machine speed and the movement of your hands. It seems so hard at first but then suddenly you're getting it. Don't give up.
Do you have your feed dogs down? And be sure to set your stitch length to 0 and your presser foot pressure to 0 if you have this control. Be sure to practice on quilt sandwich practice squares.
And please, please wear a pair of Machingers! Very helpful to keep control of your quilt sandwich
Dana