After you build, flash, and run the FreeRTOS demo project for your board, you can visit the FreeRTOS.org webite to learn more about Creating a New FreeRTOS Project. There are also demos for many FreeRTOS libraries that show how to perform important tasks, interact with AWS IoT services, and program board-specific capabilities (such as cellular modems). For more information, see the FreeRTOS Library Categories page.
The FreeRTOS.org website also has in-depth information on the FreeRTOS Kernel as well as fundamental real-time operating system concepts. For more information, see the FreeRTOS Kernel Developer Docs and FreeRTOS Kernel Secondary Docs pages.