I'm mildly surprised that after six hours no-one pointed out my slip when I said metol above. The correct constituent to avoid is hydroquinone, unless you want to risk dermatitis...
Personally, I wouldn't care to put my hands in some developers, although possibly the side effect of black fingernails from one developer (I think it's amidol, but I'm not sure) might be quite fetching. It was one of the Westons who exhibited this, as seen in at least one photograph.
On the actual technique, it's covered in most books and I dare say there are Youtube videos, but thzt's outside my experience.