Composition? :thumbup: Very nice contrast, subject to background.
Exposure? Once highlights are blown, that's it, the data is gone. It's better to keep the highlights at no more than 245 and block the shadows (less than 10, blown shadow or full black) and post process to balance the image. A handheld speedlight (on the left flower) would have helped balance the the exposure of the 2 flowers.
In the days of film it was done all the time, both pre and post processing. The best images were usually produced by the photographers that were the most skilled at burning and dodging in the darkroom.