Help with Pihole and DD-WRT settings: Pihole shows only one client connected ( the router)

[xkvr]

Hello and thanks for your reply.
To answer your question, I was following the steps from this link:

How do I configure my devices to use Pi-hole as their DNS server?

Three methods Generally, there are three different methods that will enable devices on your network to be protected by Pi-hole. 1. Define Pi-hole's IP address as the only DNS entry in the router Rationale Only is italicized here for a reason: Pi-hole needs to be the only DNS server because it intercepts queries and decides whether or not they should be blocked. If you have other DNS servers configured, you may be sent to the correct domain, bypassing Pi-hole completely. Because of this, we re…

I followed the steps in method number 2.

I would appreciate it if you can please elaborate on how to achieve the following as I am not an experienced user.

What I am trying to achieve is this:

1. Have all connected devices on my network to strictly go through the pihole for DNS requests. I do not want any request to go through my ISP DNS at all.
2. Have the pihole list all connected clients individually so I can see the traffic/requests from each device separately.
3. Finally, I would like to use a third party DNS for my upstream but the third part DNS is not listed as one of the "Upstream DNS Servers" on the pihole's Web Interface under DNS tab.

Thank you in advance