Ruthalas

Plex actually takes care of that for you, and handles access security, so that's an option that may appeal to you.

I second the suggestion to focus on setting up Jellyfin first.

One nice thing is that you can run Jellyfin and Plex concurrently until you feel comfortable swapping! I currently run both to give myself options.

His stuff very much fits the ethos!

I second the recommendation.