if you want to talk economics take it to /lit/ /his/ /biz/ or [spoiler:lit]/pol/[/spoiler:lit].
Short answer is to first read a textbook. The big 3 from when I was in college were the ones by Mankiw, Krugman, and Varian. Any of them are fine but Varian is the most "mathy" iirc. If you can find an older edition for cheap your gtg.
There are other good textbooks. Cowen and Tabarrok's modern principles is readable and great for teaching you what economics actually is but 1. it has a gay cover, 2. it's not commonly used, and 3. it's newer and thus more expensive.
Once you have the basics of modern econ I'd unironically recommend reading some of the older classics of "political economy". Progress and Poverty by Henry George is one of my favorites. Menger, Bohm-Bawerk, Mises, and the "austrians" in general are also worth checking out but I'd recommend not reading them until you understand what they're reacting against first.
That's probably year or two worth of dedicated study right there but once you read all of them you'll be more knowledgeable than 90% of people on the subject. After that you can pretty much just read whatever interests you.
Econlib and marxists.org
is a great resource for old books and articles.
Also, most of modern economics is done through academic journals rather than books so google scholar is your friend. And blogs. Blogs are big in the econ world. Check out marginal revolution.