The guide is intended to explain some fundamental concepts and elaborate upon or serve as introduction to stuff in the API POD.
These are in a somewhat arbitrary order, but you do need to understand the "Request Handling" before you bother with anything else. You should also understand the concept of event driven programming.
How sloop resolves request paths by cascading through the
Documentation index for miscellaneous topics.
How to process POST multipart/form-data requests (e.g., for file uploads).
How to cleanly stop or restart the server.
How to use Sloop::Client::TokenAuth to do cookie based session management.
Demonstration of Sloop::WebSocket.