What does a practice ransom note followed by a rambling 3-page tome tell us?

In my opinion, these two things point to the Ramseys as the killer(s). The editorializing about JR’s business and warning him not to “grow a brain” smacks of sophomoric efforts to throw off investigators.

If one (or more) of the Ramseys did this, they were dealing with a major crime scene while having no criminal history. All they had was a TV or movie representation of how murderers act. They probably thought that the longer the note, the more convincing it would be. None of them would know about the traditional structure of a kidnapper’s real ransom note. And the practice note tells me that the writer felt safe in the house. - safe enough to take a lot of time.

Consider the comments about JR being well-rested and the kind of suitcase he was to bring to the bank. A naive person might think that adding all of this makes the note sound real when it does the opposite. The word choices show a higher level of education than the average person. Yet the criminal parts of the note show a lack of knowledge about everything criminal.

The higher education points away from a kidnapper. The poorly constructed criminal demands point away from a hardened criminal. Where does that leave us? Who best fits that description?