Otherwise, just find a topic you're really interested in and find a book that explains it. You'll learn way more from a single book than you could from hundreds of articles / forum posts. Books are a wonderful escape from reality and there's plenty of leftist book publishers (Verso, Pluto Press, AK Press, Zer0 Books, Repeater Books, Haymarket Books, etc.) if you want to know about the topic from a similar perspective to yours.
Here's a nice start: Stop Reading the News.
Otherwise, just find a topic you're really interested in and find a book that explains it. You'll learn way more from a single book than you could from hundreds of articles / forum posts. Books are a wonderful escape from reality and there's plenty of leftist book publishers (Verso, Pluto Press, AK Press, Zer0 Books, Repeater Books, Haymarket Books, etc.) if you want to know about the topic from a similar perspective to yours.