Look into Jellyfin and the *arr suite for automating downloads. If this seems too complicated for now, just get a cheap 1 TB external SSD, a VPN (check out mullvad), a torrent client (i suggest qBittorrent or Transmission), bind the torrent client to the VPN to prevent leaks and off you go!
The simpler method has some drawbacks, not all TV's support all codecs and formats, you have to move the external drive from your computer to your TV for example. Getting Jellyfin setup will give you a more streaming service type of experience and if someone else than you might want to watch something, start with Jellyfin.
If the Jellyfin experience is horrible and you just really wanna watch a movie to relax on a saturday, maybe take a look at Plex.
If you already have the MiniPC just lying around then great, just use that! If you don't have it, you can also host Jellyfin + the *arr suite on your PC (unsure about Windows compatibility) and start them when needed or have them run in the background when your computer starts.
Posting this from Hyprland on NVIDIA, arch (btw) and the nvidia-open-dkms driver, but yes, NVIDIA isn't fully there yet.