You never stop learning. But it has many things in common with all those writing forms. News writing is the reverse of formal English composition. Instead of building up to the point, you put the main point in the lead, then talk about other stuff in decreasing order of importance. The communication model.
News writing is a formalized way of writing used to tell news stories.
It has its own style, tone, conventions and rhythms. Think of it as learning a new language. Don't worry if it breaks some of the rules of composition, poetry or other forms of writing. Grammar and spelling rules remain mostly the same, but the AP Stylebook tells us what to capitalize, abbreviate, which titles to use, and so on. We will read all of the text book and all of the stylebook.