Free Usenet accounts (only valid email address is needed, make a new one once you run out of traffic)
https://usenetbucket.com/free-usenet-trial/
https://usenet.farm/#trial

Get a download manager of your choice
e.g. https://sabnzbd.org/ (jDownloader works as well or so I have heard)

Download nzbs from an indexer of your choice
e.g. http://nzbking.com

http://nzbking.com/?q=babymetal
http://nzbking.com/?q=sakura+gakuin

Pretty much all the stuff you can find on torrent trackers or och is available on Usenet too
If you're interested check out https://www.reddit.com/r/usenet/wiki/