Password? Use your brain to memorize it all!
Really, I've been memorizing hundreds of password with just a simple key, hint, and reminder. Rather than using a password manager that actually a computer programmed system. You'll only forgot your password if you lost your brain!
Okay, for a serious situation, I'm using a basic text storage then encrypt it with a trusted modern encryption system, high bit level.And some cloud computed storage web app that already moving on the new way to store and encrypt your password. That's it? Nope, it's useless.
But for real, there are lots of another way to store your password than using a password manager or a computer. Sometimes we can do it manually. For your life, use your idea. Peace.