A small lesson.
A clearer next step.

Supply and demand help explain prices. These are simple models: real markets can have several changes happening at the same time.

Demand describes quantities buyers are willing and able to buy at different prices. Other things equal, a lower price usually means more quantity demanded.

Supply describes quantities sellers are willing to offer at different prices. Other things equal, a higher price usually encourages more quantity supplied.

On a simple graph, price is vertical and quantity is horizontal. The crossing of supply and demand is the equilibrium.

Imagine a freeze damages the orange crop. Supply decreases. If demand stays the same, the model predicts a higher equilibrium price and lower quantity.

Now imagine more buyers want oranges. If supply stays the same, increased demand predicts a higher equilibrium price and higher quantity.

Ask what changed, which curve shifts, and what is being held constant. A price change alone moves along a curve; it does not shift that curve.