I retired early when I became financial free of all debt and able to make way more money retired than when working. Should have retired even earlier, you only live once, enjoy it.
if I wake up early and can’t go to sleep, I’ll turn on some tunes and there’s a good chance I fall back to sleep. Jazz and blues can do this. But listening to Dream Theater or other heavy music, I’m up for the duration. If both my wife and I are up trying to sleep, we will put on some Pink Floyd or Alan Parsons on our bedroom system to fall asleep.