Take a photo of the quilt and print it out as a full sheet of paper, black and white is ok. Now study the pattern, and use a marker to draw your plan for quilting it. Does it make more sense to start in the center and work out, or will it flow more naturally to work from the edges inward? Either works -- you just need to baste securely if you want to work from the edges in.
IF you have repeating blocks and want to have a repeated motif in your quilting, photocopy that block and doodle on the paper version with a marker until you have it perfected.
Then just dive in and do it. It's free motion quilting -- it's reversible with a seam ripper, and even your biggest booboo is probably not going to look bad in the context of the completed thing.
RST