I tried! Before posting here, I read chapters 21.6 and 21.7 a couple of times. But I only understood what I had to do (and what those chapter where dealing with) after opening @AmberV’s sample project and seeing how it works.
As for Pandoc User’s Guide, the first sentence in “Using Pandoc” (the first section of the Guide after the “Description”) is: " If no input-files are specified, input is read from stdin. Output goes to stdout by default. For output to a file, use the -o/--output option:"
It does not explain first what stdin and stdout are. I am not saying it does not explain that elsewhere in the manual. But that is not a step-by-step guide for me. I felt immediately lost.
What I meant is something like this, containing for instance the sample template to test. I managed to use Scrivener with Zotero without fully understanding what Better BibText or a lua filter are. I did not need to read their manual (although I did indeed refer to Scrivener’s manual to learn how to add Pandoc postprocessing in the Compile menu). Or Scrivener’s tutorial vs. reading the manual as a first step.