OPENVPN

So I have Tmobile home internet which I love, so I have a linux server setup and I set it up to use as a openvpn server, my problem is I can’t connect to my openvpn server from outside of network which is using udp port 2847, I also created a netgear ddns name as well. I know how to use the local xpose commands. I configured my client.ovpn file to use the external ip address of my router as well. Any help would be very grateful.