https://ros2-tutorial.readthedocs.io/en/latest/
https://ros2-tutorial.readthedocs.io/_/downloads/en/latest/pdf/
ROS2 Humble tutorials by Murilo M. Marinho, focusing on Ubuntu 22.04 x64 LTS and the programming practices of successful state-of-the-art robotics implementations such as the SmartArmStack and the AISciencePlatform.
If you're looking for the official documentation, this is NOT it. For the official ROS documentation, refer to this link.