Deciding on whether to learn Rust or OpenGL next

I’m currently a student studying Computer Science. I love to learn new things in order to further enhance my skills in the things I find useful. Part of me wants to learn OpenGL so I can get a better understanding of graphics programming, and to apply it with Unity game making (working on my very first game). However, I am also intrigued in what I read about Rust and too also gain an additional programming language that I can add to my arsenal. I’m stuck and don’t know which would be more useful in the long run. I would appropriate all the help I can get. Thank you!