My advice is to find the aim list and have someone sweat a session. I realize this is weak, but worth a shot. Sounds like you really need to be talked through a hand or two.
Also, perhaps, try writing out all the quiz questions in a given chapter SSHE in say Notepad, and print out the quiz and take it, checking your answers after you are done. i.e. in the text, the answers are listed just after each question, which is not conducive to learning. If you fail, reread a chapter then take the quiz again.
Finally, if you are still having issues, I suggest trying your hand at
this hobby instead (NSFW)
Buzz