If one thinks about why people say they are not creative, I think you will find that there is some anxiety or fear in the prospect of even starting on a project. Any first time experience from a first date, job interview, meeting new friends, trying a new recipe, having a baby, buying a house is difficult and wrought with anxiety. Even creative people have first time anxiety in using a new medium, being quite complacent in what they know. We are creatures of habit and changing any habit is leaping into the unknown. Being and staying a Creative is the process of being a new person over and over again. Live is meant to evolve. Jump in the water is fine.