Adding more pages to your website is easy!
Within your website's editor, open the Pages and navigation panel on the left and click Add page:
Rename the page and save the changes:
If necessary, you can also edit the URL, hide the page from your menu bar and go through the SEO settings of the page. Alternatively, you can skip these steps for now, and come back to it later.
NOTE: For the changes to reflect online, remember to update your website