Go to settings in your dashboard and then to “reading” change your homepage to a static page. This page will then load whenever you load the main site url.
You can then create the other 7 pages and add whatever content you want to those pages. Make sure if your menu (appearances/menu) isn’t adding them to go ahead and add the pages there)
If you need to add individual blog archives to each of the new pages, your theme may have a shortcode or you’ll need to run a query for each page and / or setup page templates for each of them.