"a song based on his experiences"
I'm surprised by your sense of needing to consult him. Does it mean you have never, yourself, experienced people talking about you, how you move or how you learn, as if you weren't there? If you are that fortunate, I still would have gathered that yet you've experienced enough parallels to create a darn good message in the framework of that kind basic story.

FWIW there is no rule about writing one song at a time. Songwriters everywhere put away drafts for hours, months, decades sometimes. But maybe I just mention that because I am most comfortable as a "40-gallons" writer--that's how much has to gush or drip out before I can boil off a single gallon of syrup.