We had some random rock band play at my middle school as a reward for the entire class passing finals or w/e and I was mesmerized. Got my first guitar for my birthday in 7th grade and by my HS graduation I'd been in 3 different bands of varying genres. I took like 2 formal lessons before my parents pulled me out for not practicing enough (bro taught me c Major scale and I still know it so I must have been practicing enough) from there I just learned with guitar tabs.
As for the personal experience... The first chapter features a quarrel over who is the better "leader" or "frontman" of the band now that they've gone pro or whatever and that comes straight from my first bands breakup. There will definitely be more experiences I draw from in the future.