I found this page very helpful in understanding each step of the QR code creation process. I can't say I recall it all but it would be possible to turn this into a small booklet, I guess.

https://typefully.com/DanHollick/qr-codes-T7tLlNi

Here's a HN discussion from 2022 about it.

https://news.ycombinator.com/item?id=32837565

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Phemist 2 days ago | parent [-]

Nice! I also found this page very helpful:

https://www.nayuki.io/page/creating-a-qr-code-step-by-step

This is an interactive guide that will break down the process for your specific QR-code.

	▲	mft_ 2 days ago \| parent [-]
		That's the best explanation I've seen - thanks for sharing!