If you can plot out your days by having different energies and exploring different ideas, then that new energy will get you unstuck in another place. You are purposely unblocking yourself and translating ideas from one domain to another. So the advice of don't multi task, for most people who try to keep everything in theirhads, is absolutely true. You shouldn multi task. With a second brain. And so ironically, and this is very weird how this happens, thinking and working externally allows you to do many more simultaneous things,. which reaps the benefits of multi tasking without any of the downsides.
Systems that must be perfect to be reliable are deeply flawed. Instead of trying to create a perfect organizational system before starting to create things, concentrate on consistently moving your projects and goals forward. Your Second Brain will evolve to suit your needs only when you put it to use in your daily work.