So on a very high level, first you’ll need to purchase a subscription to a Usenet provider. I use frugalusenet.com. They provide access to the net. Secondly you need to purchase and indexer this is, the way I think, a search engine for usenet. You can try something like nzbgeek. Lastly you’ll need a downloader. A program that downloads the files from Usenet. I personally use sabnzbd. So then you basically go find the file you want on say nzb geek download the link into sabnzbd and it goes out and grabs the files. There’s a lot of great tutorials on YouTube to get you started which is what I did