Yes. Continue to # 2.
No. Stay on this step, or come back to it now and then, until the answer is yes. You can write pieces while you figure this out, but consider it practice. You can read ahead in this list of questions to see what else you need to be prepared to do, but consider it research.
Check out Story and Idea Resources.
sandrayeaman.com 
Sandra — the link to “read more of this post” seems to be broken.