Well... it's not that hard to understand. It's like learning to write. If you can memorize how letters go together, you can memorize how certain strings of numbers go together in a code. And once you know the basics, you can just go from there.

[He smiles.]

I-I could show you some time...?

[ALTEREGO has to chime in as well;]

There's also many helpful online guides and videos to help you get started! But Fujisaki-sama would be the go-to person to learn from! It's Fujisaki-sama's Super Duper High School Level Talent, after all!