Whisk is a native macOS app and supports common macOS shortcuts including Command - S to save, Command - V to Paste, Command - Comma to open Preferences, and so forth. This documentation only reflects keyboard shortcuts which are unique to Whisk.
Whisk uses a standard macOS text view, which has a rich number of keyboard shortcuts, including many emacs key bindings. This guide from Amsys(opens new window) has a good list.
Code Snippets can be inserted using keyboard shortcuts. Please refer to that documentation on how to use and change them.