Good points. I would add that 99.99% of marketing books/sites/blogs/magazines aim to keep you as a reader. Which means that they will simply keep feeding you stories about marketing without telling you the real basics. You may only learn what works by doing it yourself. Learn about simple sales techniques, some copywriting, and off you go. The reason marketing is hard is due to how it is more a constantly changing process than a static one. You cannot rest on your laurels.