- Create a new site in Settings > Sites > New Site
- Make sure "This Site Has Its Own Base URL" is checked
- Go to the "Entries" section, publish a page, and set the entry slug as
__home__
- Return to the Entries section, switch to Site 2 using the dropdown menu at the top of the screen
- Publish a page and set the entry slug as
__home__
Craft knows which site each page belongs to, so there will be no conflict between the slugs.
You can use any section you like to publish your homepages, as long as the Entry URI Format in the section's settings doesn't require a special syntax. Many people use a "Single"-type section or a "Structure"-type section with a URL setting of {parent.uri}/{slug}
. Make sure the section is available to be used by Site 2 in the section settings.