I personally prefer Plex (I got the lifetime PlexPass before Jellyfin was even a thing) but I agree with this 100%. Set it up on a spare computer (or even a RPi,) and toss it in a closet. Then you can use the *arr suite to automatically download new titles.
FileBot will help you automatically rename downloaded files for easy media detection; Historically, the big complaint with Plex/Jellyfin has been the files need to be named very specifically. But FileBot takes care of that, and even downloads subtitles and posters/box art/etc automatically (though with OpenSubtitles API change, that may not be the case anymore?)