Ask HN: Best informal introduction to Economics?

I would like to study Economics out of curiosity and for the sake of my own education. I am not planning on becoming an expert.

Can you recommend any informal resources to study Economics? I've heard about books such as "Naked Economics" and "Economics for the Common Good" but I don't know how good/bad are they. The resources don't have to be books.

The questions are on my mind at the moment are: How does a country's economic system work? How do markets function? How do systems like Capitalism and Socialism function?