Mapping Keyboard Shortcuts in Word (vba) KeyBindings.Add KeyCategory: = wdKeyCategoryCommand, Command: = "..."

Choose Developer>Macros. Change the Macros in dropdown to Word commands. The complete list of available command names is displayed.

If you need to set specific indentation amounts, you'll have to write a simple macro instead of relying on Word's preset indentation values.

But it's probably better to avoid VBA altogether. Instead of relying on local formatting (which a Word command or macro would do), create a typestyle with your preferred indentation and apply that to the text. That's a better practice in Word and easy to update later if you change your mind about the amount of indentation.