To change the default home page, you can follow these steps:

1. Log in to the SharePoint site with an administrator account.
2. Navigate to the Settings icon in the top right corner.
3. Choose Site Contents in the left navigation.
4. Look for the list Site Pages on the page.
5. Select the page you would like to be your new homepage.
6. Open the ellipsis menu to reveal the Set as Homepage button.
7. Click Set as Homepage.
8. Confirm the updated homepage in the browser.