Perhaps it's mentioned in a later chapter, but the important thing about consuming input is not just snorting media like cocaine, but doing so consciously and critically. The same way riding a bike for commute or recreation won't make you compete in the Tour de France (that's what doping is for) you need to put conscious effort into your "training".
And for a personal addition: also pay attention to what other media does badly, so you can avoid the same mistakes. And I don't mean watching wanton agenda-laden "analysis" channels on YouTube (=pundit commentary, masked the same vain that colourful mascot packaging makes little kids brush their teeth) but use your own judgment and scrutinise your conclusions (can you find counterexamples? What did they do different? Most rules are rather guidelines.) Even if you never end up writing anything, you'll learn a lot about your own preferences and strengthen your media literacy.