In WordPress there are different Post Types and the most common are Pages (used for static content) and Posts (used for dynamic content). If you want to EDIT a Page, once you are logged in, go to Pages, find your page, hover on top of it and click Edit. Below you can...
Working with your Theme
How to Edit the Footer
To access and edit the footer of your website, go to Dashboard/Divi/Theme builder. There you will see the green footer module, which after clicking on the pen icon on the left, can be edited like any other page, built with Divi.