Excellent introduction to the two most important forms of meditation: Breath and Metta.
It does not have guidelines for how fast to progress. I did each meditation several times, about a week each.
It does not cover other types of meditation. A beginning mediator should not feel restricted to these two forms. If neither of them clicks, it's discouraging. It's also good to have a large toolbox even if one of these forms does click. More methods means more opportunities to be mindful throughout the day, even if you can't manage a formal sit.
However, it's still a very patient and reassuring introduction, and a good place to start your meditation journy.