How can I calculate skewness and kurtosis on a baii+?

You do not have to calculate skewness nor kurtosis for any of the CFA exams.

oh, I see. Is that why ppl don’t use the official textbook. They include examples that’s not even tested.

That’s certainly part of it.

You have to understand those terms meaning. Try to understand what negative or positive skewness and peaky kurtosis mean in terms of risk and return. Don’t waste your time trying to perfectly understand each isolated term meaning and calculation in CFA curriculum. Such manner of study looks completely unsustainable to me. Just study and exercice and you will mastering all those terms as a whole. This is not only maths and statistics exam.