Here's a good guide, t's old, but nothing should be too different.
https://www.cuttingcords.com/home/ultimate-server/getting-started
Use radar instead of Couch Potato.
You can find up to date guides for any of the individual products.
I recommend NZBgeek's lifetime subscription.
Then, set torrents as your news group's backup and you should be good to go.
Spend an evening setting this up and you'll be golden. Just subscribe to any shows or movies you want and it will automatically download them when they are available.
You can set preferences around quality, file size, language, format, etc