Thank you for reminding me of everything I love about Superman.
Anyway, to be honest, my answer to the question would be that I would be terrified of my powers and never use them except in the privacy of my own home. I would probably feel guilty about not using my powers to help people, so I might eventually get over it. I don't know what I'd do after that point, though. I don't have any confidence I would know the right solutions to the world's problems, much less be willing to impose them on everyone else, so I definitely wouldn't take the authoritarian route a lot of people here seem to be interested in. When I finally do use my powers, I would probably be kind of like Superman, I guess. I would definitely have a secret identity like him so I can have a normal life and job, and in my "Superman" identity, I would try to help people how I could...though I'm sure I'd be nervous about doing so. I would probably start small. Or possibly, like Yoda, I would be like the Secret Identity Clark, and not even really "go public" in my superhero identity - idk. Also, for my superhero identity, I would like to have a costume designed after Superman's; even though I'm a woman, it would be more like Superman's than Supergirl's. I would probably crush some coal into diamonds and give them to charity, but I'm not sure I'd do that for money for myself...maybe I would, I'm not sure. I would also use my powers to travel.