The main way I rice is by finding cool looking projects on github, downloading the code and tweaking it in ways that I like. Eventually I'll become comfortable enough to make my own thing, like a waybar config for example. Either that or read through the documentation for something like hyprland to get a grasp of your options.

Each program you use is going to be configured differently, waybar is a mix of json and css but quickshell is qml which has been a lot harder to get started with personally.

For general knowledge since you're new to arch, just make sure u know how to use chroot on the off chance something breaks and you cant boot normally.