Hello Xeon!
Honestly, I have never read the book you mentioned above, but I attended such kind of course about three years ago and… I think I was going to die.

We spent two days by activating the right side of our brain by drawing like crazies. We were sitting on a chair ten hours without any break and we were just drawing, drawing and once again – drawing. On the first day, I left the course and there was nothing I could see, only lights, shades, shadows, dark parts, light parts… That’s why Katya says that she changed the way she sees things.
I have to agree with you that most of the art books assume that you have some experience in drawing. I have a book for so called absolute beginners

and the book begins with this: “Take your pencil and draw an apple.” Mmmm, fine, I will draw an apple, but … how?
So, all I wanted to say is, that Betty Edward’s method says everybody can draw – and yes, I met people (including myself), who couldn’t draw a flower and on the second day they left the course with a quite fine self – portrait. Yes, this quick course gave me a lot, but, unfortunately, it did not teach me to draw. I had to practice and learn to see things by myself and create my own drawing style – without any teacher, without any influence, without any help (this was my decision).
So, there are two possibilities – first, that you find a good drawing course and a patient teacher (and you will be a little bit influenced), or, second, that you will practice, practice and once again practice alone. It will take some times, but you will see your own results.
So, I must definitely agree with Katya!
And … I also think that all of the lessons there on Drawspace are just excellent!
Crossing your fingers!