Translation of volatilidad

I want to improve my level of English. Have you ever been in the U.S. and in which states have you been? I've been in England, Scotland and Ireland, but unfortunately, I have never been to America.
I've never been to America, but I wanna fly to New York in the end of this year, maybe go to Washington and possibly to LA. It would be nice one months to learn English there. I started to learn now.
I do not like London, my home is in southern England, and there is a lot of work there too. A lot of people are moving to London just for work. I've been here for 10 years and I am studying chemistry.