I think of the newbie routine like a compass. One of the best aspects of it is that it’s a generally safe starting point for anyone and you can gauge your individual body’s response to it and adjust up or down depending on the feel and results you get. Some get more results with more work, some get overworked, strained and lose by overdoing it. If you’ve got the time, try adding in some extra stretches and see how you respond. But definitely do not get too caught up in believing that more is “more” until you get a good idea of how your body responds to the exercises.
I know for me that I had my best gains when staying on the lighter side of things, or whenever I added a new exercise or device and started easy and light. The times I’ve pushed too far and done too much have only left me with disappointment, negative PIs and no gains.