Cryptogram cerita

I honestly don't expect any asks at all, I just did this for the funs x'D

This is Zodiac Speaking. I have been named the unidentified American serial killer of Northern California by sending letters and cards containing ciphers and cryptograms and murdering 37 innocent victims. Only one of my four cryptograms have been solved. I guess you really need to think like a mastermind to understand a mastermind. DISCLAIMER: This story is FICTION. The contents of this story is based off of true events stated in legal case files of the Zodiac Killer. The Zodiac Killer is/was a real person and the identity of this person remains unidentified. I AM NOT the Zodiac Killer, this is simply a fictional story about the on goings inside a criminal mastermind's brain. BEST ACHIEVEMENTS: #1 in zodiackiller #2 in pseudonym

I found this old envelope folder with papers inside that had a bunch of strange things written on them I can't understand, maybe you can help?