I highly recommend you give this a try…
How To Remember Anything Forever-ish
I’ve long been a fan of reviewing the notecards that I take daily each night. Whether you’re running a company, teaching a subject, learning a subject, learning the guitar, or finding your way through life… you should be scribbling down notecards daily. Then review them at night. Then index and archive them repeatedly.
It’s a beautiful, easy (mostly) free system that will change you and help you change the world.