Thank you so much! Well I am also figuring that out myself. For me I think the best thing that would bring the most value is to subscribe to those feeds who you're genuinely interested in like for me I love to keep up on AI/ML research so I have a lot of AI/ML blogs in my RSS feed including the latest news as well. I have also added the Hacker News Daily Digest as well. Link to where I got that one

I think it takes a while to get used to it like I understand where you're coming from when you said that you get little value out of it. I think it is the matter of who you like to read up on and is in your interests too. If you're interested in AI/ML, Science and Tech here's the github link to that optml and you can use Feedly to import that file if you're interested or just choose the ones you really want to read which is fine too! Github link to those RSS feeds

Edit: I just found out that you can convert your favorite community on Lemmy into an RSS link, just link on the RSS logo right beside the the question mark inside the circle.