So whatever page you have specified as your home page, make sure you set this in CMSSiteManager>Settings>Content>Web Site Content section (most likely /Home). Then go to CMSSiteManager>Settings>URLs and SEO>SEO - URLs and make sure you have
- Default page set to Use page defined by default alias path
- Process domain prefix set to always use WWW prefix (or not, your choice but don't leave it as is)

With those setting set, you have done what's needed in the link you provided.