Singers become singers by not giving up, trying, starting theatre school or entering a talent competition or making themselves recognised. They have to have a good voice so they probably done choir...
Punks are influenced from the Punk music they listen to or the teen angst in them. Most Punk songs send messages to people to just be you and people can relate to Punk music because it is mostly teen...
How would I become a singer? Well, I, for instance, would take singing lessons, make sure that my voice is clear enough, have a bottle of water, just in case, and be prepared to sing in a talent show...
You believe in yourself. Go to a recording studio in Hollywood , write songs, record them and send them to an audition or studio so it can be graded to see if you are good enough. I'm sure you will...