Thank you very much for offering your assistance on this request. I really appreciate your willingness to help out.
Reading the FAQs better and saw
"Log into your router’s configuration page and find the DHCP/DNS settings. Note: make sure you adjust this setting under your LAN settings and not the WAN."
My router GUI (r7000) doesn't seem to have a LAN DNS, just a "internet" DNS. 
Also, Found LAN DNS server for local names on Netgear R7000
Suppose I'll just enable DHCP on the Pi-hole.