I need help/advise!

I am hoping you (the reader) can give me some /any advise. I am hoping to find work as a rehearsal pianist and/or musician in an orchestra in any musical. Where should I go? What are my chances? Are rehearsal pianists in great demand or are there too many of us and not enough work? I havent had any experience, but I have been classically trained for 15 years and have done years of accompanying. Also when they say they are an ameateur musical company, does that mean no one (actors/ musicians) gets paid? Should I do payless musical work, just for the experience before I go to England? please help!