None. It's like all self help books or "learning to read" books or etc. The only thing it does is make you feel like you are accomplishing something and actually "learning". But you are just wasting time.
The title is even self-defeating. "Learning how to learn". How can you learn to learn without already knowing how to learn in the first place.
In order for the class to be useful to you, you would have to already known how to learn to learn the material.
Ultimately, those truly motivated would have gone on to learn what they wanted regardless of this course. And those unmotivated will not go on to learn regardless of this course.