Hey, I plan to live in New York for a few years at some point in the future. Not sure how easy it would be but I'm a graduate with a decent job so a few years exerience under my belt we'll see what happens.
For what its worth Clacher mate it seems to me as tho you want more than to move to actually find something you're happy doing? I know myself how important this is and it took me a long time to work out what i wanted to be doing, i was 24 when i went to Uni. I've a good job now (not great pay but ok - its my first career job since uni) and my own flat, even once you work out what you want to spend your days doing things just don't fall into place and you'll still doubt yourself - its natural - I'm seeing a girl who's an architect at the moment and she left uni over 2 years ago yet says she still feels like she's bluffing her way thru the job even now! Personally if i was you and i got the chance to head to the US now I'd be off straight away - but I'm not you!
Either way best of luck mate.