You could, as others have said, contribute to existing codebase if you have the skill set. You could develop expertise that could pay off down the road. My ques

You could, as others have said, contribute to existing codebase if you have the skill set. You could develop expertise that could pay off down the road. My question is: does it make you happy to read about OSes? If so, I think you could definitely have worse interests. Best of luck.