"I’d start with, at most, 10 news sites to subscribe to. This will give you a feel for how fast you want the feed to move. Too slow? Add more. To fast? Delete a few. I try to narrow things down even further: Instead of subscribing to the New York Times, which publishes dozens of items per day, I subscribe specifically to the Times’ tech section, which means I get a much more curated selection."
Seconded. And hey, I could have written this. This article has great advice for embracing the decentralized lifestyle. I personally use a self-hosted Tiny Tiny RSS
with Reeder on iOS
which costs about $8/month at AWS. Instead of limiting feeds, I subscribe liberally and put them in folders by subject. Then I browse by subject periodically instead of the full list of feeds and tune from there.