Quick Answer Response (+additional followup question):
https://kagi.com/assistant/afacbcd0-38ae-48c9-ad47-510aa93ef457
It answered everything, but what I looked for - and added some filler word which are not specific enough to help with anything.
Especially the "Switching to DHCP" part is really bad: "This is done using the nmcli command".
I specifically asked for a nmcli command, and it tells me to use nmcli - thanks :-D.
And then it gives me a command to add a new connection, because DHCP is default for new connections... what?
After follow-up question, it got it right (that is Ki Quick then though).