I will never succeed at bullet journaling. It’s never going to happen.
This is something I realized recently, after several attempts at the concept. I’m not good at planning ahead, or spending lots of time preparing for something; and bullet journals – at least, the way I’ve seen it handled – takes a lot of time. You need to hand number the pages, and design the layouts in advance. You can’t just sit down and write. You’re keeping track of things, and that means you have to know all of your assignments and grocery lists and whatnot at the moment you’re writing them down, and keep updating it.