Recommended · for some experience
STM32 FreeRTOS Tutorial Series – Tasks, Queues, Semaphores & Mutex (CubeIDE Guide)
Why people recommend it
A video course on FreeRTOS, suggested for learning real-time operating systems on STM32 parts and useful alongside a book, with lessons that transfer to other boards.
Watch for: Built around STM32, so other boards need some adapting