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had a bad day from data recovery failure. Sorry for the bad remark.

However, learning basic usage for Linux does not require a 500 page book even. It is as easy to pick up as Win is. maybe a 50-80 page book could get one started and running. Learning mid to advanced Linux will require a 500 page book. Learning to master Linux would require a small library.
You are correct though that if a problem happens, everyone already knows Windows so verbal support and asking around is much harder in Linux.