You can but there has to be a priority. Starting a side hustle is a grind and can easily interfere with your career. It depends on your goals and comittments.

Doing the bare minimum is different from excelling in your career. A side hustle may interfere with side projects and development relative to your career and goals.

I write on the side but I had to step away from my podcast because it was interfering with my job. All situations are unique and variable.