What was Jesus' first miracle?

Answer: Turning water into wine

At a wedding in Cana, Jesus turned water into wine, the first of His signs, and revealed His glory.

“and the master of the banquet tasted the water that had been turned into wine. He did not know where it was from, but the servants who had drawn the water knew. Then he called the bridegroom aside”— John 2:9 (BSB)