Now get the tools that you comfortable with, “draw” on the clay. Try short, meddle, long hairs etc, get to know the controlling methods. Try making small or big wavy levels. Add fine lines in layers, bigger tip tool goes first, sharper tip goes after. Follow along the clay in direction, well, somewhat irregular, according to reasonable hair growth. Brush it with nylon brush and nail polish remover. Do some touchup after brush off the scraps.