Make a quilt sandwich with a pre-printed panel, using the same batting as you have in your quilt. Practice on this - following the lines of the pattern and then FMQ in areas where that would fit. You can adjust your speed and get an idea of what works best for you. It does take some time to co-ordinate machine speed with your FMQ movements, but when you find your "groove" you should be more comfortable starting on your quilt.