I'm pretty new to FMQ myself. It definitely takes practice. I think I'm doing...OK with it.:)
I agree with Quilter 7x. When you first start, set your speed on medium (if you can set the speed control...if you can't, it might be a bit more difficult to maintain a steady speed with your machine, and that makes it more difficult), pedal to the metal, and move the quilt slowly.
A BIG pointer that I read here...slow your HANDS down when you're making a tight curve or loop in your stitches. I found myself going too fast (moving the quilt, not the sewing machine speed) for those tighter loops and would have those loopies in my thread on the back...if you take it nice and slow around, it prevents that.
Before *every* quilt, do a test sandwich with the same fabric and thread that you will be quilting to get your tension sorted out before you start the real thing.
Relax your shoulders and sit up straight or you'll be hurting.
Listen to some music, it will help you to keep a steady pace with your hands.
Good luck!!!