Creating sub pages will allow you to categorise your pages, to nest beneath your parent page.

From your blog dashboard or view click on +New and select Page
Give your page a Title
You can add content (e.g. text, images, links) into the input field.
From the Page Attributes menu select the page that you want to be as the Parent page from the Parent drop-down menu and your new page will nest underneath the page you have selected as your Parent page.
Once you have finished click Publish.