This set of core lessons should give you a good understanding of what data resources are, how to configure data resources and how to work with data in Composer Pro. They also include how to configure and make use of REST API integrations.
In this video we'll go through the configuration for REST API direction integration resources.
In this video we'll go through creating data variables from data resources and using therm.
Finally we'll go through using logic flows with data resources and variables.