I think that every time you buy a book in preparation for learning something, that is a way of asking questions to the book. At some point it has to stop and you have to act. The value of those resources in other people's perspectives become so much more value when you are constantly acting. It's not trying to amass as much knowledge as possible. There is we're afraid that, because we don't know, we will fail or get harmed. But it's like going on a trip through the forest... You need to be lean and dynamic and adaptable and trust in your ability to figure out along the way.