Some sources of information:
- Getting started guide on hexdocs.
- Built-in modules on hexdocs.
- Unofficial modules on hexdocs.
- Videos showing Livebook features on youtube.
- José Valim solving "Advent of Code 2021" on Livebook on a youtube playlist.
- Further resources on elixir-lang.
Hovering the mouse over an element in a code cell that has make a window of the official documentation (from hexdocs) pop up:
String.to_integer("42")