>>2877856Settings less relevant here. The geometry of the image is solid - but I might work on the blacks a bit in places where the noisy "glow" doesn't help the image. Consider doing an aggressive noise reduction on a new layer and "painting" it back into areas of deep shadow.
>>2877988It's ok - black and white is perfect for this. It's a simple abstraction and nice.
>>2879131You need a strategy to deal with the noise.
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My first long exposure - taken with a CanonT1i and a kit lens around Vegas. Put the camera on the ground on a timer, hopped into the rental Ferrari and launched it.