Bash syntax - I recommend Unix Power Tools by O’Reilly, but it is more advanced so maybe start with a basic version. People look at me funny whenever I say this, but I started myself with something like Unix for Dummies. Why not!?
Keep in mind that this is no trivial task: bash is basically a programming language unto itself - it even has conditionals, loops, variables, etc. Yet SO worth it if you use Unix and want to know more what it is doing.
You also should have a basic familiarity with Unix foundationals as well, to know why something such as this is very dangerous:
export PATH=“~/bin/:$PATH”
So, the easy way would be to just take the nice file, copy it wherever you want, and leave it at that. The hard way of actually understanding it may require a deeper dive into Unix. Unix Power Tools, with the picture of a drill on the cover, or maybe someone will recommend a better option but that’s what comes to my mind.