You can choose among 3 to 4 blog styles and 10+ options to customize it: to have a sidebar or not, the side bar left or right, the colour used in the blog for the title, the meta and the widget titles…
To customize your blog style open the Customizer: Top WorPress action bar >
Customize > Theme > Blog Options
Note: the ‘Blog Layout’ option is the blog styles displayed in the demo.