Lyric discussion by jaymay03 

A song to hard to follow That no one else can sing

what does this line spesifically mean?

I think it's saying that no one can tell you when you are growing into adulthood; that it's something that you have to figure out on your own.

I got from that "A song to hard to follow" was the how difficult it was to know what would happen next in your growth from adolescence to adulthood. "That know one else can sing" means that it is something YOU have to experience, no one else can do it for you. It is different for every person.

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