I thought, like you, the Shearer book would be easy to play through when I got it. I was already able to read the music, having taken a few years of lessons on a steel string guitar. But I got a teacher who insisted I “learn properly”. He held me back so much and so often I finally got really excited when I got to turn a page a play something new. I finally realized the music is simple so you can concentrate on what your hands are doing. Maybe because I had already played guitar or because it’s the way my teacher works, the concentration was on getting the right hand first. Since completing the book he has been working on getting me to improve the left hand. This has worked very well for me as I seem to tend to get overwhelmed easily.