Surfing around the web I found some video lessons from the Académie de Poitiers in France, that shows you how to make a basic skirt and bodice using “moulage” or in English called draping using a dress form.
You do not have to know French as a language to understand these visual learning video lessons. Just watch and enjoy.
Draping a basic skirt (Moulage de la jupe de base)
Draping a bodice ( Moulage du corsage de base)