A beginning writer must follow the path that feels most comfortable. For most people learning to write, that path is nonfiction. It enables them to write about what they know or can observe or can find out.
Any person who can speak English grammatically can learn to write nonfiction. Nonfiction writing is not difficult, though it is a technical skill. What you need for nonfiction writing is what you need for life in general: an orderly method of thinking. Writing is literally only the skill of putting down on paper a clear thought, in clear terms. Everything else, such as drama and "jazziness," is merely the trimmings. I once said that the three most important elements of fiction are plot, plot, and plot. The equivalent in nonfiction is: clarity, clarity, and clarity.