There’s plenty of guides for Linux, but with Windows you’re a bit more reliant on installers and reading some of the guides about setting all the bits up.

Off the top of my head, you need:

qBittorrent (for downloading, turn on the web interface, and you can configure it to do nothing if not connected to your VPN)

Prowlarr (this scrapes torrent data from websites and collates it all together for the other parts of this system, add some sources once you install that)

Radarr (browse movies and pick which ones you want, link it to Prowlarr and qBittorrent, give it a folder e.g. D:\Movies to download into)

Sonarr (same as Radarr but for TV, again link it to Prowlarr and qBittorrent, give it a different folder e.g. D:\TV to download into)

Jellyfin (an open source Netflix, allows you to play the stuff you downloaded in a pretty web UI, or through a client program you can get for a couple of platforms, add the folders you told Radarr and Sonarr to download to)

Then you tweak everything that annoys you. By default it’s quite happy to grab full 60GB+ Blu-ray releases, which is fine if you’re on a fast connection and have lots of storage, but if a movie is over 10GB or so, it all looks the same to me. Depending on how you watch, you might have to mess with Jellyfin clients to figure out why certain videos won’t play. It’s pretty good but it’s not perfect.