It's a bit complex to setup to be fair, you probably want to go to the site that cannot be named here and look for a Usenet guide.

The long and short of it is you probably still are going to need to sign up and pay for a Usenet server that focusses on files. I use newshosting as my primary server and usenet.bucket as my backup (you need to because DMCA)

You also need a tracker. I use nzbgeek. This is to search for files because they are all broken down fragments across the messageboards

Finally you need nzbget or some such to download the files

I then use sonarr and radarr to manage my downloads and Plex to watch the shows.

The last bit is just a nice to have.

I know it sounds like a lot, and it is a bit to get started, but it's solid and just works once it's going.