Need help to turn black and white

Hi.

Messing around tonight, and took this photo, need help though

I need to know the easiest way to convert it to Mono. Black and White, but I want to keep the hands and the colored reflection in color

I know the reflection should not be to hard, as you can cut it out? or make another layer, I really do not know much about PS when it comes to this side of it

But the hands, well I guess you have to mark around them????

Any help would be appeciated, and feel free to edit, comment, as it is all very new to me this sort of photography

Thanks

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I used this tutorial when trying selective coloring TUTORIAL

Many Thanks job done

http://www.madproff.co​.uk/images/T1bw-web.jpg

finished verson