These are my dotfiles, maybe you don't use my setup but you find something of interest here.
What I do for setup my mac:
For the keyboard:
System preferences --> Keyboard
--> Change the "wait for repetition" for the shortest value.
--> In keys change tab by control.
This script installs the programs I use and my config.
If there is something private I need to add from an zsh script the ~/.config/private.zsh is sourced if exists.
You can apply this same system for private configurations like env vars, ssh keys, etc.
For any problems or errors that might happen, please, create an issue. Thanks!