From you config,

Radio1 is repeater and it has connected to your main router.

Radio0 is AP and you should connect to ssid “openwrt”.

If you have no Internet when you connect to “OpenWrt”, seems that the firewall is not correct. You created “wwan” and need to add this to your firewall.

Pls also give the output of “ifconfig” and content of “/etc/config/firewall”