How do I self-study robotics? What are some ways that I can learn about robotics on my own or do some of my own research in order to impress graduate school admissions?
This is Blue Robotics forum and not a generic robotics forum.
I believe that the best place to do that kind of question is in /r/robotics.
But, to not let you down, you should check this youtube channel that contains some tutorials for ROS, ROS 2, gazebo and others.