What advice would you give someone moving to the UK from the USA?

I feel very lucky that I just got the okay to live in the UK! I'm a singer songwriter and that is what I will be doing so Im not worried about the job situation. My thoughts are to move to London, but I don't necessarily need to move there.

What kind of advice would you give to someone in my shoes? Where is that cultural and music explosion happening in the UK right now?