I have been an artist "since I could pick up a crayon" and that has carried over into creating cookies - mainly "drooling" over everyone else's creations . . . but occasionally I do create them for a special event or Christmas.
Recently I made cookies for my daughter's First Child's Baby Shower and was fairly happy with the results though I struggled with a couple of things- and learned through the process. I should not have tried to pipe the wheels/handles, etc. prior to flooding. I then had to go back over them and they didn't turn out round. The dots were not the same size either... but I did like most of my royal icing transfers- flowers & leaves and the "watercolor effect" flowers.
Practice, practice, practice.