The problem I find with both of these are as Alfred begins with simple tunes and theory it isn't as musical as I would like...
Think of the Alfred's songs as something you're being taught. It is a quite brilliant book. Bases on teaching you, methodically, building upon one to another. You should be able to look at a song and determine what it is it's trying to teach you. Get it all down good. It is the basis of playing well. Don't worry about it being musical. That is not it's primary intent.
I understand on songs. I don't know what to tell you. I have a couple I work on. One is for a recital here. If you look at the sheet music advertisements here. They all have an easy version of each song. Even at this point. My teacher likes me to go ahead and work the easy while I study the original. The original is for learning sake. She loves Original.
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon