I think there is some good advice and information here but i can understand why the OP and many others would still want to move here.
It's exciting and fun and an amazing city. It does have negatives, but what city doesn't? It really depends on what you want at your stage of life.
I came here in my early 20s and everyone else was telling me the work culture was tough, the pollution was bad, the climate was terrible (compared to UK). And its the same issues now 10 years later.
But when i was starting work, i kinda expected to be in a shitty role wherever i went. Its so rare to find your dream job the first few years of working. Its different at my current stage of life where i have other considerations. But when i moved here, i was more than happy to work a shitty job living in a small flat, but in an exciting, convenient new city.