Well, I guess you will have to jump right in and start it... What is the worst thing that can happen?
Do small section at a time, take some break to rest, check what is done regurlarly so you can pick up the "mistakes" and don' t be your own quilt police. Stand back 3 feet and if it looks good, IT IS good.
the wavy lines would be perfect.
Feel the back of your quilt as you quilt a small section. You will be so proud mistake or not!