Your goal for these first couple of weeks is to learn to sight read the notes of the pentatonic scale. Focus on getting them into your brains and your fingers. Use the exercises in the book and the "tests" to learn the notes.
Next week we'll play Safari again, just because it will seem so much easier, and Rocky Mountain High, both Uke I and Uke II. Note that the Uke II parts in both of these songs are all open strings.
We will also plan to play Acadian Lullaby so practice finding the notes in this song at home. We combine half, quarter and eighth notes. Slower Mp3 files of these songs are on your resource page.
Try picking Oh! Susanna and Up on the Housetop (if yo must) - both very satisfying because you know how they sound!
A few notes about practice - 10 minutes, a few times a day is more valuable than 1 hour each day, all at once. Break your practice down into short phrases of the song (2-4 measures). Practice the hardest parts first.
We have just started. Hang in there.