you should sprinkle the yeast evenly over the surface. It should drop into the wort in its own time.
This yeast is bloody good yeast I love it but always think I am underpitching with it and its the same price for 7g as the other dry yeast is for 12g. It does work well but if its over 1.050 gravity id prob want to pitch 2 packs. Or if you were to ferment under 17 deg pitch 2 packs