New Wifi SSID with VPN routing

Router
1

Hi, tried a few searches but nothing I could follow or related.
I’m looking to add a new Wifi SSID for dedicated VPN routing. Any ideas?

Flint 2

3

Started with this guide. Much better than most i've found.
https://openwrt.org/docs/guide-user/network/wifi/guestwifi/configuration_webinterface
Start here, move the VPN...

4

Actually, for now given up. Was easier to use the existing IoT and add the VPN to that connection.

So now have...
Main Network: 1 x 5ghz, 1x 2.4ghz (ISP)
Guest: 1x 2.4ghz (ISP)
IoT: 1x 2.4ghz (VPN)