Quite some men have experiened that women could improve their skill of handling penis. The grip is usually too limp and lacks certainty. Women seem to be afraid to pressure, yet sometimes pull, tug or even scratch at inappropriate moments, disrupting the rhythm.
Men love to have their penis worshipped, played with, tickled, fondled, massaged.
Let him know that you are not afraid, ashamed or disgusted. Don't start stroking or pumping it all at once. Take time to watch it grow full, run over with your hand over the head, the shaft and the balls up and down. The hand motion should be swift and smooth, without bumping or stalling. Bring your palm up to the top of the glans and park it there flat out, fingers held together and stiff, thumb pointed straight out.