@johnpoz
My drawing above is the existing config. The Netgear switch is completely unused. I would be fine using that if need be for the VLAN or port 5 or 6, although from Example 1 here, which I was going to loosely follow for the VLAN tagging, it appears to me, I should be able to remove a port from VLAN 1.
https://www.tp-link.com/us/faq-788.html
Tim