It can be as simple as running a VPN on your computer, and downloading torrents through a torrent app on the same computer. Then you can just watch the videos you download however you like.
If you want a Netflix-like interface for what you’ve downloaded, run Plex or Jellyfin and point them to your downloads. Get the plex or jellyfin app on your tv, tablet, phone, etc as well. The app will see plex running on your computer and you’re good to go.
You can keep getting more advanced depending on what you want. For example you can use apps like Sonarr and Radarr to automatically send movies and shows to your download app as they come out. You can also use things like Bazarr to automatically get subtitles. Tdarr to encode what you download if you want to do something like make sure everything works on your tv and a specific streaming stick (eg: roku).
And on and on.
I use all of that, and have it set up through docker on a server which has access to a giant NAS for storing the files.