1. Mix a heaped teaspoon of dry active yeast with a teaspoon of sugar and a bit of lukewarm water/milk. Allow it to come "alive", which means the liquid starts to get bubbly. Sort of like the picture above.
6. Allow the dough to rise in a warm place, eg. near a radiator. Or heat the oven to 50 degrees celsius and turn it off before putting the bowl in. the dough should rise to 2x its size.