In the Learn GraphQL tutorial, developers can learn how GraphQL simplifies data-fetching and state management for front-end developers and acts as a structured API for backend developers. To get started with building full-stack GraphQL applications, two training resources are available: the Apollo Course Platform's Lift-off series and the Official Apollo Full-stack GraphQL Tutorial. The Lift-off series teaches core components of a full-stack GraphQL app, including schema-first development, GraphQL's Schema Definition Language, and connecting to the GraphQL API from the front-end using Apollo Client and React. In contrast, the Official Apollo Full-stack GraphQL Tutorial builds an interactive app for reserving a seat on an upcoming SpaceX launch, covering topics such as building a GraphQL schema, fetching and displaying data with Apollo Client and React, and sourcing data from REST APIs and databases.