It doesn’t connect? It connects, but you cannot reach the internal networks? You can reach the internal networks, but the clients can’t access the internet through the VPN? What (doesn’t) happens?
Ok. This looks like a routing problem. The tutorial you followed is just for outgoing connections. To incoming ones the thing is a little different.
I have 2 intranets, one OpenVpn and 3 WAN links. I am not using load balance, since I want to use a given link to a given purpose - but I can connect the OpenVpn clients in any of the 3 WAN interfaces. Used the following post to do the setup (should work to you too):