Thank you for your reply. I think I will look into getting a domain, however I still want to try this, to use it as a learning experience. Try to make it work like this, then keep learning and probably switch to a domain, which seems to be the common thing.

Thanks for your reply. I am not sure about this. Following the tutorial I created a compose.yaml file that had proxy settings:

  proxy:
    ports:
      - 80:80
      - 443:443

so I would assume that already takes care of the ports?

I will have a look at dedyn.io and the tutorial you shared once I manage to reach NextCloud locally via the IP address. Thanks