Nothing worthwhile can ever be achieved until a decision is made. You're in control of your decisions and your decisions are in control of your destiny.
As a start-up writer, there is need for you to define your area of interest. You should know what inspires you to becoming a writer. Choose what interests you most and make it your pathway to achieving your dream, then work on it. Both fiction and nonfiction writers have everything in common- they are writers, authors, and the both achieve greatness and influence when they write prolifically.