Create sub pages - once you have created your page you can either drag it under a previously created page - or select the three dots next to the page you would like to have a page created underneath. Just select create sub page.
Rename page - select the three dots next to the page you would like to rename and then select rename page.
Duplicate Pages - select the three dots next to the page you would like to duplicate and then select duplicate page.
Embedded below is a GIF followed by a 1 minute and 49 second YouTube tutorial I created.