Most art is the result of numerous trial & error. Most finished works of creativity/art, be it visual, music, poetry or prose, are preceded by numerous sketches, drafts, discarded attempts and edits. Creativity is a process and requires work. I think this is important to know as so many people think that they aren't artistic or creative as they can't immediately create something wonderful. But those that can seem to create spontaneous art have practiced a lot to develop that skill. It is possible to practice creativity in order to develop more.