If you set up ipv6 on the jellyfin server, you’ll be connected locally to your server because with ipv6 even if you use a domain name, if the server is in your lan it’ll connect locally to it.

I just setup kasm workspaces and it’s been awesome for anonymously using a web browser.

Which orange ? I’m with orange Belgium.

As a beginner myself I would recommend you installing portainer (a gui for docker) and if you need compose files I have them for all of my services on my GitHub.