How to create a VPN tunnel to access router and FreeNAS from WAN

I want solutions and help with whatever method that will get me the results.
And I know that if I follow your instructions it will work so I will follow your method, even if it is simpler will Wireguard.

Thanks for your help.

root@OpenWrt:~# opkg install luci-app-vpn-policy-routing
Installing luci-app-vpn-policy-routing (git-20.036.30966-0b513de-69) to root...
Downloading http://downloads.openwrt.org/snapshots/packages/mips_24kc/luci/luci-app-vpn-policy-routing_git-20.036.30966-0b513de-69_all.ipk
Configuring luci-app-vpn-policy-routing.
root@OpenWrt:~#

Done.