I find myself writing a lot of replies to beginner threads too - mainly on Muffs and Reddit
Most beginners do not even appear capable of reading a post 3 down from the top which has 90% of the answers they need
Most of the issues are about cramming too much functionality in a small rack with little or no utility
or trying to save money with an effects only rack to start with hehehe
In terms of a manual - a quick start - "read this before wasting your money" guide - with links to more in depth coverage may also work
as for how to describe cv I'd go even further back and talk about pressing a key on a keyboard (gate and v/oct) and twiddling a knob, then how that relates to both midi and cv
and I'd add a list of things to list when posting beginners questions - what other gear they have, mixers, outboard, computer, audio interface, other instruments etc etc what sort of music they hope to make etc etc
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities