I think Debrid services are the easiest and safest to get started. They download files for you from various services (share hosters and torrents), and then let you download them from their servers. That means only they know your IP (but don't log it, like a VPN), and they also download with full speed from sites that require a premium account, for a fraction of the cost. With RDT-Client you can also use some of them with Arr apps, once you get to automating the process.

Another thing would be Usenet. It's surprisingly easy to set up and get started, just find a provider, some indexers, and a download client. It has a ton of good content, and it doesn't depend on seeders for file availability and high download speeds.

With those two you can download anonymously and at high speeds from all the popular sources (most share hosters, torrents, Usenet), and you don't run the risk of leaking your IP because you haven't set things up correctly.