No cape required
Superheroes don't have to be only fictional. In fact, you have all the makings of a real superhero. Just as you are, right where you live. You can be a libertarian superhero.
When presented with any situation in your own life just ask yourself "what is the way to handle this without initiating force or deception", then do it. Don't meddle. Don't impose upon other people unless they are harming the innocent. In that case, if it suits you, step in and rescue the person being victimized on your own instead of dialing 911. It might be easier if you accept your basic human right and responsibility to be prepared to deal effectively with aggressors. It will also be facilitated if you train yourself to see through statists' smoke and mirrors. Don't let government or its advocates pull the wool over your eyes.
It doesn't require "superpowers"; only the power to resist going along with the crowd as they head over the cliff of statism. You have the ability to buck the system, so be a libertarian superhero and do it.