You get a bad review with a novel, and it hurts. But I imagine if you get a bad review with a memoir, it hurts more because you can always say, 'Well, they didn't like my characters,' but when you're the character, it's like, 'Oh, yeah, they actually didn't like me.'
For the fiction students I teach, one of the most common mistakes is to start in the wrong place. Often the actual story doesn't begin until about a third of the way into their narratives. They start off instead with excessive scene-setting, metaphysical speculation, introducing nonessential dramatis personae, throat-clearing, etc.
The main thing is to think strategically about what will engage your readers. Trust me when I tell you that few people are eager to read a story whose opening lines sound like a dissertation on giant bugs.
I'm no fan of jam bands. You can take your Gov't Mule, your Phish, your Rusted Root. But Derek Trucks is a special musician - perhaps the greatest slide guitarist who ever lived.