Hola Angie,
Yes, maybe this month's book is too difficult, so better if you go on studing with the help of a children's book.
Your experience with that German class sounds good, as one thing is learning the theory, but another one, very different is going to the practice; it's normal to have 'problems' with the pronounciation, as in this case, for example, English and Spanish have not a lot in common!
Let's us know how do you go with this new children's book, and if you need any help, please post your questions here or e-mail me. ok?
Hope to hear soon from you,