Mistakes are learning opportunities for you, the instructor and the rest of the class. You learn more when you correct mistakes than if everything goes perfectly. Thou shall ask how the training can be applied to thine own job needs. You know your job best. Thou shall honor the time schedule and be on time for class and after breaks.
Time is money in a training class.
If you are late, you are wasting not only your learning time and money, but the time and money of the rest of the class. Thou shalt not whine or be negative. Whining doesn't make the software go faster or work better. Whining doesn't change corporate policies or procedures. It just wears down your energy, as well as that of the instructor and other learners.