gardenchick

I am trying to do a B/W with color. The directions that I have found are confusing to me. Here's what I found. New layer, then duplicate layer. On 2nd layer run B/W, on the same layer rub out in places where you want the color. Ok, then that's where the instruction stopped. I have been trying this all day & cannot get it to work. What am I leaving out? Is the majic wand what tool I should be using?Sorry to look so dumb, but this is making no sense to me at all. Please give advise.