Is there a way to transfer all the settings in my Google WiFi main point (reserved IP addresses, port forwarding, etc.) to a Nest WiFi router? I plan on upgrading the point to the internet to Nest so I can upgrade to Google Fiber at 2 G.
No, I'm afraid there isn't an option to do that. You can either set up a new network with Nest Wifi as your primary router (recommended) or add Nest Wifi router to your existing Google Wifi network, keeping your primary Wifi point as it is.
I just wanted to check in real fast to see if you saw @davidking's reply and to find out if you still needed any help on this. If you're still needing assistance, please just let me know and I'll be happy to continue helping.