Sonarr Radarr qBittorrent Jellyfin

Sonarr lets you 'subscribe' to TV shows. Radarr lets you 'subscribe' to movies. They grab the movie/TV Show as soon as they're available and match the quality profile you choose. They find the torrent (searching on sites that you've configured) and send it to qBittorrent. Once the torrent is finished it downloads metadata, formats everything and puts it into a media folder structure that Jellyfin can read. They then poke Jellyfin to tell it to update it's library with the newly downloaded content.

Jellyfin is a media player, it can be accessed by a web interface or you can install Jellyfin apps which exist on basically every platform.

You can host all of this at your house or you can host it on a seedbox (I'm currently using Ultra.cc). The Seedbox provides you with a very fast connection for accessing bittorrent (50+ Gb) and 20TB of upload bandwidth per month. The seedbox I'm using doesn't count your Jellyfin usage (or downloading via the FTP/SFTP server) towards your bandwidth so you can stream as much as you'd like or download the files to your home media storage or both. They have different levels of storage (my ~$35/mo plan has 8TB of storage)

A seedbox also lets you join private trackers easily (as you can maintain ratio thanks to your massive upload speed and excess bandwidth). Private trackers will generally have torrents on faster hosts so you can download them quickly and the quality/selection can be better.

It's a little bit to get everything setup but once it is setup it basically takes care of itself. I have Ombi installed also, it provides a simple user interface for my non-technical users so that they can add things to Sonarr/Radarr without having to much around with their interfaces.