So I set up TT-RSS the other day and it's generally nice, the only problem is I'm trying to find feeds that are interesting more or less. For example, we all enjoy watching TV, right? So I took the TV OPML from awesome-rss-feeds on GH and applied it, and was not amused. I don't watch that many television and I very quickly realized that none of the content in those feeds applies to me at all, so I removed it.
Start with Lemmy feeds. Open a community, sort it by, let's say, top-day posts, and copy the RSS button link. Here we are - top posts for 24h for a community you like but in RSS.
I am subscribed to Ukrainian National Bank news, Kyiv Subway (Metro) non-urgent news, the news feed of our president, few government ministries. All this is to keep up to date with government regulations.
Then there are a few developers and IT and Tech portals with worldwide news for their fields - top for the day, top for the week, and top for the month in separate feeds. Anandtech, for example.
I used to be subscribed to a few Twitter accounts by RSS via a RSS-Bridge, but it's gone now.
A few vendors for the products I like.
A few VR portals as I have an Oculus Quest 2 VR headset.
Unraid news, as I own one.
Thinking of moving email GitHub releases subscriptions to RSS.
I can continue if you want.
You asked for RSS-feeds suggestions from us lemmings, and after I suggested you an approach to find the feeds for yourself you are telling me that you see no reason in using the feeds at all. That's a weird conclusion :D