I usually write explanatory nonfiction, but now I am interested in something more narrative--think Erik Larson or Rebecca Skloot, for example. I write clearly, and understand basic ideas about narrative elements like story arcs, scene setting, dialogue, etc. but there's a difference between understanding a concept and being able to apply it effectively to my writing. Where do you suggest I look to find the kinds of exercises or suggestions that help me move from conceptual understanding to skillful writing?
I read a great book, Between the Lines: Master the subtle elements of fiction writing by Jessica Page Morrell. I wrote to her and we have corresponded. She also wrote Thanks, But This Isn't For Us: A (Sort Of) Compassionate Guide to Why Your Writing Is Being Rejected. Both books are a good fit for the writing transition you describe. The second has more exercises, both offer great information on the specifics you're looking for.