Absense of getting started doc

[speller]

Hi,
I'm completely new to the Flutter. I'm reading the Readme doc "Usage":

1. I'm pasting the first code sample: S.delegate - S is undefined, GlobalMaterialLocalizations - undefined, GlobalWidgetsLocalizations - undefined. How to import them?
2. Setup the arb files - how? There's no instructions in the ARB repository: https://github.com/google/app-resource-bundle. How to install something without instructions?
3. The first English file is generated for you - by whom? Nothing is generated on my computer.
4. How to install this package? Huh, should I google even this?

Could you add a more detailed doc, please?

[noordawod]

Hmm, what IDE are you using?

[speller]

Hi, I'm using Android Studio.

[noordawod]

Did you install the plugin in Settings > Plugins?