i have been trying to get an openVPN server which allows port forwarding, i am using digital ocean for my vps i have tried 10 times and i always get the same results, I have followed a lot of guides on internet noting seems to work.

https://whattheserver.com/openvpn-server-with-port-forwarding/

this guide describes best what i am trying to do, i have followed each and everything from this guide but after getting a vpn connection when i check my port (which i opened using iptable) on canyouseeme.com it tells me that the port is closed,

If you can help me with this issue and guide me how to do it properly i will be very thankful. thanks.