(Fresh installations, Go to Appearance > Customize > Publish to save the starter content such as menu bars, widgets ect:-)
1. Create Menus :- Non fresh installations, Go to, Appearance > Menu and Click View all locations. Theme has 2 menu areas called Top and Footer.
If a menu already exists, create a menu and assign to top menu, the pages you have created above except the home-page. Add home page as a link (https://yourdomain.com) in menus. Create a menu and assign to bottom menu. Click save button.