I would definitely get comfortable with paper piecing before tackling a JM pattern. There are a lot of them that are only available for purchase once you've enrolled in a class with a JM-certified teacher, because so many people struggle with them. I have a very experienced friend who has advanced skills in all areas of quilting, and she struggled with the Vintage Rose pattern for quite some time. I recommend starting with a small project, such as a table-runner, to familiarize yourself with Judy's technique.