How can I become a punk/scene?

Punk, scene, emo and goth are not the same subculture, though there is plenty of crossover between punk and goth, and punk and the original emotive hardcore scene (which was derived from hardcore punk). Scene and "emo" has plenty of crossover, but all of it looks ridiculous. I'm not going into the history of punk and goth, but trust me, it's stupid to think that you can become punk or goth overnight by changing your look. These are subcultures with fashion styles that go along with them, not fashion tends to change whenever you feel like it. If you are interested in punk or goth, research it and learn about it and see if it suits you, then listen to the music, and if you like that THEN maybe start the fashion. However, you seem interested merely in the sartorial aspects of an edgier style. Fine, where whatever you want, but don't call yourself punk.