The underlying theme of breadmaking is keeping the yeast happy by providing a good growth medium. Yeast makes carbon dioxide gas that acts as a leavening agent. Start by proofing or growing the yeast.
Yeast requires a warm, wet, environment and a food source to multiply and thrive.
The water should feel warm, not hot, to the touch. Provide a food source, a little sugar or honey. Set the yeast aside until the mixture resembles a creamy foam. This should take only a few minutes. If nothing happens, discard the yeast and begin again.