To create a page go to 'Content' in the dashboard on the left side, and select 'Pages'.
To add a new page click on the button '+ Add page' in the top right corner. To edit an existing page, simply click on the page that you want to edit.
In the next form you can create a new page. Fill out all the fields, to add a text or photo click the 'add' button. Once you are finished, click save and the page can be published.
To publish your page make sure to tick the 'Published' radio button instead of the 'Draft' radio button. A page can only be created when a publication date is included.
How to create a page