Using ROS to controll Tello Dron

Hey, i want to controll a real DJI Tello drone. All the theoretical stuff i will get from the courses Programming drones, OpenCV etc. but how do i actually get ROS on the drone? How do I install it and controll it with ros, and if there is a course for that, please just link it or any other sources where i can find instructions to that.

Thanks in advance :slight_smile: