If you encounter a problem or task, then do it using shell commands. This will push into asking the question "what command can do X?" and "how do I connect command X to command Y?" and "how do loop commands over output?". Then just keep doing that over and over again.

Learn the shell chainsaw: `xargs`. `xargs -L` vs `xargs` and `xargs -I` (examples will say use `{}` but I'm partial to `xargs -I @` because that works with Fish and Bash, plus it's a single character.