Adventures in Floral Arranging...novice

I am having a floral moment. I have had 4 photo shoots in the past month since I have been back from Greece and it got my thinking about my flower arranging. I feel like I do a pretty ok job, but always, no matter what I do, the lovely Sarah Dorio makes them look incredible. I think I want to take a flower arranging class, if any one in the Atlanta area has done so and really enjoyed it please let me know! Otherwise I'll stick to crossing my fingers and hoping it looks ok from an amateur level. Either way, Sarah's love for "details!" makes me love the floral shots she takes and let's face it, who doesn't like to look at pretty flowers?