Don't read books. Ask for help. If you need help with unlockable levels or something like that, either go to the chat (stencyl.com/chat/enter/1), which isn't for asking questions, but many people do, and we usually answer (I do, at least), or ask a question in this forum, in "Ask a Question".
EDIT: You could also try starting out in a program called Scratch, which is like Stencyl, making a game with blocks (That's where the idea comes from), but it's much easier. You could use that for learning, but with blocks it's harder here and there you can't make flash games, only upload them to their site. (scratch.mit.edu)