I think this is a great shot, really nice choice of location even if it does look a bit dangerous ;) Think I would go with previous consensus that the lamp above the head is distracting, but you could easily clone it out. Also think the lighting is a tad harsh on the right hand side of your subject, think the light from that flash could do with being softened/diffused slightly. Like I said though, great shot and I love the lights in the background.
Definitely much better with the lamp post gone. As far as the lighting goes though I think thats an excellent shot. If its your first time out with that gear I’d be very happy, very creative use of the lighting. Nice one!