Just want to reiterate that the best thing to do is follow your instructors' guidance carefully. Make sure you do the exercises and the assignments, even the ones that aren't being turned in or being graded (pre-Moodle, we had many more that we had to turn in for grading but it was a great way to keep on track).
Don't get ahead of yourself, this is not easy stuff. We are all planning to prepare for the certifications, and Andrews is one of the best preparations for it. We're all working toward that goal, and you have a lot of material to absorb! Also, don't worry if the exercises in Hazelwood (and later, kuehn) seem really hard -- they are -- they are aimed at students at a higher level than us, but it serves an important purpose to give them a good shot. At the same time, don't be discouraged if you can't get them all.
Also, just from my own experience, you will really need to fire up on all cylinders to get through Module 2, so make sure you clear the decks well beforehand.
Best of luck to you!