its been a while since i checked out mine, but the ones i do still sometimes read are
hackernews frontpage: https://hnrss.org/frontpage low-tech magazine: https://solar.lowtechmagazine.com/feeds/all-en.atom.xml xkcd comic: https://xkcd.com/rss.xml oglaf (often nsfw): https://www.oglaf.com/feeds/rss/ and k6bd (a long comic, highly recommend starting at the beginning): https://killsixbilliondemons.com/feed/
they might not be the best for you, though, you should try looking for if the websites you read still have an rss page
a pretty basic newsboat setup though i do have a script set to update it every 30 minutes (maybe i could set it to wait longer, i dont need immediate news forever)