Learning simulation with Pixhawk is an exciting journey! Gazebo is a great place to start—it's a powerful simulation tool that supports Pixhawk and allows you to test flight controllers in a virtual environment. To get started, you’ll need to set up a computer with the necessary software like Gazebo, QGroundControl, and PX4. As for hardware, a USB connection for your Pixhawk and, optionally, a joystick or RC controller for manual control are good starting points.