You're welcome.  Another thought occurs to me.  Every time I've taught a young player I noticed it was helpful to tailor the curriculum to keep them engaged & motivated.  With that in mind it might be helpful to tell him to consider focusing on things he is passionate about & for the time being skip things that he don't pique his interest.

For example the chapter on fingerpicking might not be interesting right now.  And it's a skill that will require a lot of repetitious practice.  So that might be demotivating.  So skip that material for now & work on something that will motivate him to practice a lot.  For example different strumming patterns, or adding embellishments.  Eventually, if he keeps playing guitar he'll reconsider the topics he skipped & go back to them to flesh out his skills.  

I think it's really important at a young age to keep kids incentivized to practice as much as possible.  Because these are his formative years any skill he develops now through dedicated practice is invaluable & irreplaceable.

Best of success.