100% on this. Exercising, especially lifting weights, feels like you're improving yourself after every single session. You will literally see the difference in the mirror.

It's something that you can control. You can't always control how lucky or successful you are in your career. But you can always control your exercising. Once you improve the way you look, you start to feel better and people will also see you as more confident. Slowly, you'll get more opportunities.

Tldr; control what you can first which is your body, and the things you can't control will slowly get better.