Just me, but if I had a new longarm, I would wait until I was fairly proficient with it before working on a quilt that has so many hours of hand work in it. You're going to want the quilting to be really special, right?
I might quilt a couple of sheets with the blocks drawn on the top or photocopies pinned to the top or something. Anything where you can get the feel of accentuating the blocks and flowing in between them. :)
I like that book and the option to add dimension to the flowers. :)