How do I successfully pursue a hip-hop dance side gig?

I am not planning to major in dance at university, but I still want to pursue hip-hop dance as one of my passions and as a side gig. What are some tips so that I can successfully network and break into the industry, considering I will not be able to do it full-time? I am currently considering moving to either NYC, London, or Seoul. Any advice related to this that is specific to any of these three cities is much appreciated as well.