Curious what other people use?
- Daily email from the NYT. Skim the headlines, read only what's very interesting or very relevant.
- Google News. Skim the headlines, ...
Seriously, you almost always don't need to know the details. Just to be aware of things is usually enough. As you point out, if you try to know the details, you'll be overwhelmed.
Just read what's very interesting or very relevant to you. Shift that when it becomes a topic that you may need to vote on or work in, or some other measure of relevance.
You cannot keep up. You can't. Let it go, and live your life.