I have FMQ'd with the feed dogs up and it worked just fine because the darning foot doesn't put much down pressure on the fabric.
I would buy some panels or busy large print fabric and practice around the printed designs. They are always cute and a non-quilting person will never know your mistakes and will love the lap quilt, table runner, pot holder or wall hanging you made. By finishing them, It also gives you the feeling of accomplishment and the practice binding them that I know I need.