Can I publish news or blog articles?

Yes. Open a site in Website Builder, then choose Entries and News / Blog. Each post gets its own page, an author, a publish date (set it in the future to schedule), and optional categories and tags. Each post also chooses who can read it (everyone, members, or paid subscribers). Add the News / Blog block to any page to list your latest posts automatically.

Every article has a Type. News is the standard feed; the + New Type button above the article list adds another (Press, for example), and picking a type there writes posts of that type. A News / Blog block on your site lists one type (News unless you change it in the block's settings), so a new type stays off your pages until you place a block for it.