No problem. THe page/post id is displayed in the browser address bar when you edit the page. In this case it would be your home page. It would be something like this:
yoursite.com/wp-admin/post.php?post=6&action=edit
The permalink under the page title might look something like this:
Permalink: https://yoursite.com/?page_id=6
If you scroll down the page, below the editor, you’ll see a “Layout” option for that page. Make sure it’s set to the default “X” or the full page setting.