So I was able to install everything correctly, but I don’t know what I’m supposed to do in order for people that don’t have my same IP to see my files. I’d like to share my Jellyfin server with some friends so they can see movies there. I’ve already open the ports, but they can’t still access them, I’m using elementaryOS Hera which is built on Ubuntu 18.04.4 LTS.
You can remove that code from your post because it’s showing your real URL
On your jellyfin server (access it locally) you can create accounts. I think you should have an admin username and password already as part of the set up. Make sure you use a strong password.
You can make additional accounts for other users you want to give access to.