Writing your story, publishing it and offering it to the world. This can take years. If you do not think that you are a writer in the beginning, give it the time, and when you are finished call yourself a writer. Memoir is writing from memory. It need not be linear. It often is a collaboration of all of the senses.I believe if you cannot write as emotionally honest as possible, there is no point in writing at all. Your story is as important as any.