Human knowledge is siloed and you need to already be well-informed to judge the quality of information (this is the cause of the dunning-Kruger effect, if you’re really bad at something you lack the tools to understand just how bad you are).
So imo you have to accept you’ll always be ignorant of most topics and get comfortable with thinking “I don’t know”.
Within your own specific areas of competence you should be able to identify independent sources of information that add value and consume those while discarding the rest.
Also when it comes to politics and international affairs: no substitute for travel. Go to lots of places with different systems, talk to people and you will learn a lot more than you will from reading the economist