Wouldn't trust the EU with my data especially with the increasing popularity of laws like chat control and the rise of far left fascist governments who want to censor and control everyone.
Delete speedtest.net, YouTube, YouTube kids and ChatGPT and use either web apps or favorite them in your browser, as Firefox for iOS is really bad compared to other platforms I would recommend you to use brave instead as it comes included with an adblocker which works really well. Also do you need all of iOS’s bloat ? Do have an Apple Watch ? Do you have an Apple TV+ subscription ? Do you use HomeKit for smart home devices and so on.
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.
That’s what makes me dislike more and more the FOSS community because it seems none of the FOSS devs have seen a women in their life and have very sus kinks.
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.