Yeah, that's what I've been doing, it's just tough!
One thing I did, for example, is that the best friend describes the main character and a crush object as "coordinating." (Both have same color hair, same color eyes.) Main character disagrees, describes several differences, while lingering a bit on the better qualities of the crush object, to the friend's amusement... that sort of thing.
I re-read the first few chapters of Percy Jackson and Harry Potter and decided to go with third person. (They both do just straight-up describing though, pretty standard for the genre. Some of it's organic, most of it's not. Percy is basically the future-self narrating, as George suggested.)
Then I actually started converting and it's lousy! Too much is internal. Reads much more awkwardly when converted.
I can take the material and completely re-write it of course.
Definitely glad I'm trying to puzzle this out before I get too far.
Meanwhile, totally other question -- Sozlet has wanted to read "Hunger Games," I've been resistant, just decided to go ahead with it. We'll both be reading them, me first to screen a bit (I think it will be OK). Do you (everyone here) think it's a bad idea to read a book in a given genre just as you're trying to write a book in a similar genre?