I'm writing this because I hope it helps other Zoho Sites users. I kept going back and forth with Zoho Sites support and Network Solutions (NS) support bc their respective information for DNS settings aren't compatible. 

Rather than documenting the full thing, I just wanted to share the resolution I finally got today.

When logged in to NS, go to "Manage Account" (upper right of screen), then under "My Domain Names" select, "Edit DNS." Under Manage yourdomain.com > Advanced DNS Settings, select "Edit."

This will open a screen that says "Updated Advanced DNS for yourdomain.com:

Under IP Address (A Records) these are the settings I used (with my domain name erased). Zoho doesn't provide numeric IP addresses so those sections are blank:

Under Add/Edit Host Aliases (CNAME Records) these are the settings that work (again with my domain erased):

Please note, my company uses GSuites/Gmail for email, so those settings are set up for that. (And why I didn't share MX records.)