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I haven't read it in detail, and I don't know how difficult it is, but there's a free book on how to (among other things) automate Office applications with Python:

https://automatetheboringstuff.com/

Chapter 12-14 look relevant to you (Excel, Word, and CSV).

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I have read it, and it has become my most recommended book for someone trying to get into programming or technology in general. It won't tell you how to do every single thign in the universe, but it can give a great starting point for automation and programming in general.

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