If I were to get into studying Economics, I would start with Khan Academy videos on Micro and Macro Economics.
https://www.khanacademy.org/economics-finance-domain/ap-microeconomics
https://www.khanacademy.org/economics-finance-domain/ap-macroeconomics
This will give me a pretty good conceptual base for which to build upon and dive further into the ideas and principles.
Next I would read some books on economics: A search of best economic books yields a large list. I looked into it and those that stood out the most to me were:
1) Freakonomics (Levitt & Dubner)
2) Why Nations Fail (Acemoglu & Robinson)
3) Capital in the Twenty-First Century (Piketty)
4) Animal Spirits (Akerlof & Shiller)
5) The Armchair Economist (Landsburg)
While working through these 5 books I would attempt to complete the 8 week online course through Coursera “Introduction to Economic Theories”. (https://www.coursera.org/learn/intro-economic-theories#about) This should help solidify the Khan Academy lessons and provide a greater context for the ideas.
After having fun getting the basics down I would dive deeper into classic texts. I’ve done a tiny bit of research and though I’m sure there is a lot missing, these are the classics I’d seek to read.
1) Wealth of Nations (Smith)
2) Das Kapital (Marx)
3) Capitalism & Freedom (Friedman)
4) Human Action: A Treatise on Economics (Von Mises)
5) The General Theory of Employment, Interest, and Money (Keynes)
6) The Affluent Society (Galbraith)
7) Capitalism, Socialism, and Democracy (Schumpeter)
Lastly, I would round out the exploration of Economics with some Yale Open Courses on YouTube and stick with the syllabi presented at https://oyc.yale.edu/
Classes of interest:
1) Financial Markets (https://youtube.com/playlist?list=PL8FB14A2200B87185)
2) Game Theory (https://youtube.com/playlist?list=PL6EF60E1027E1A10B)
3) Capitalism: Success, Crisis, and Reform (https://youtube.com/playlist?list=PL2497FD1251EED4DD)
After this I bet you could definitely hold your own against an undergraduate with a minor in Economics. An Undergraduate Economics Major (looking at various University Handbooks for Major requirements) has several more classes on Micro/Macro Theory, Banking, Statistics, and Accounting.
Anyway, that’s what I’d do and now that I have it outlined like this maybe I will do this for myself and learn some Economics.