Another Shelley from Canada! Hi!
As I am inexperienced, I'm not sure, but I could make one suggestion re photography... I originally photographed my cards on a very textured barn board, but then I realized that the background was so detailed, it was detracting from the detail in the cards. Maybe you could try shooting your pieces on a more neutral background to make all the beautiful and colourful details stand out?
Just an idea : )