Everybody has their own free motion style, even if they are relatively new to it. Some hate to mark or follow lines, others like the security and guidance of markings. I agree with the many others that a loop-d-loop design is a good one to start with.
However there is more to free motion quilting than an all over design. You didn't say what kind of quilt you are working on. You may want to let the piecing guide your quilting. Gentle curves from corner to corner of your blocks might work well as a beginning design also.