To create a new page with Edma Moodle please follow this doc.
Go to Site administration->Appearance->Themes->Edma settings or yousiteurl/admin/settings.php?section=themesettingedma
Remove the home page URLs form Add your “website page link that you want to hide bottom content” field
Now go to the home page and add a new page from page’s bottom content and click Add an activity or resource button.
Click the page resource box
Publish the page by providing the page contents.
Now go to the page and click Add a block button to add a new section.
This way you can set up your custom page design with Edma blocks and Moodle blocks.