Remember to create a route from your internal LAN machines to your pfsense / OpenVPN network. ie if internal lan is 192.168.10.0/24, pfsense is on 192.168.10.3 & your OpenVPN client lan is 192.168.20.0/24, you’d want something like route add -net 192.168.20.0/24 gw 192.168.10.3