In this case you want local setting. Network settings I'm guessing you mean the one under "Internet" section? If so don't change that. pi hole is for local request to be filtered before the final request goes to the internet.
Yes, meant “internet” section. Thanks!
So, in Network Center > Local Network, DHCP Server, Primary DNS -- I would put "192.168.1.8", the IP address of my NAS and my PiHole, correct? Would I also put it in Guest DNS Server?
One thing that confuses me: so, the PiHole console also has a DNS section where you can choose cloudflare, google, etc. How does that work with the router "Internet" section where you can choose upstream DNS as well? Does it cause conflicts? Am I running two DNS servers?
Also, do I need to port forward on the router since my pihole is at 192.168.1.8:8181?
Sorry for these ignorant questions.