Hi Isaac ! How are you ?
When you want to access a service from outside your local network, you need to forward that request from your public IP to your private IP.
One way can be through port forwarding, configured in your router. Another way can be using SSH tunnels, such as ngrok (ngrok . com) or similar.
However, you can ask your ISP for more information on how to publish a service from your local machine.
If you need anything more, please don't dub to ask.
We're here to help =)
Have a nice day!
PS/ My last reply was deleted by Google because it has external links, now I used blanks to add it. I hope this fixes it, and I apologize for the delay.