In a small bowl dissolve the yeast in warm water for about 10 minutes. Stir well.
In a glass or plastic container, combine 1 cup sifted flour and 1 cup sugar. Mix thoroughly or the flour will get lumpy when you add the milk.
Slowly stir in warm milk and the dissolved yeast mixture. Cover the mixture loosely with a lid or plastic wrap. The mixture will get bubbly. Consider this Day 1 of the cycle, or the day you receive the starter. I would put this mixture in a ziplock bag so I could continue with the recipe.
For the next 10 days use the starter according to the instructions.
Notes
It is very important to use plastic or wooden utensils and plastic or glass containers when making this---no metal.