Do, Just listening is not a way to develop the skill,. Print the manual, that makes it physical. PhotoReading the books on the computer.
I preferred to learn the system with printed material since reading on screen is naturally slower than reading printed books. Once you learn the system it makes no difference.
The advantage of printed material, it's easier to recognise and experience some evidence of the system working, like thinking of a question, just opening the book to the correct page. Also flipping the pages is faster than on devices and computers. As well as being scary fast on computers when you hold the key.
If it's possible to split pages for the ebook you are PhotoReading I suggest you do so. It's just simply faster with the tapping technique.
PhotoRead the PhotoReading book as advised in the course. There is a reason the course introduces the system by PhotoReading the PhotoReading book.
Alex