I recommend Greg's Bash Wiki ... https://mywiki.wooledge.org/BashGuide. See general notes, then at the bottom of the page are many links to additional considerations.

Like others say, "bash" is a hard tool to get right (and I'm not saying I do it right either, necessarily, but Greg's Wiki was real helpful!). I'm building a hybrid bash/python3 environment now (something I'll hopefully open-source at some point), and bash is just the "glue" to get things set up so most aspects of development can funnel through to python3 + other tools.

But ... things that make bash real useful:

    * it's available everywhere (even in Windows with Ubuntu-18.04/WSL subsystem)
    * it can bootstrap everything else you need
    * it can wrap, in bash functions, aliases, and "variables" (parameters), the
      real functionality you want to expose ... the
      guts can be written in python3 or other tools

Without a good bash bootstrap script you end up writing 10 pages of arcane directions for multiple platforms telling people to download 10 packages and 4 pieces of software per platform, and nobody will have consistent reproducible environments.

EDIT: I think there's a revised version of Greg's Bash Wiki in the works.