You’ve got it backward in my mind.
He was sayin that His “lack of power time” had not come from. Therefore, the wine issue was simply not a problem.
HE gave Himself for us. He willingly set aside His power and went to the cross. That’s what He meant by “my time has not come yet”.
His ministry obviously had already come. It began at His baptism, as Luke writes:
“21 When all the people were being baptized, Jesus was baptized too. And as he was praying, heaven was opened 22 and the Holy Spirit descended on him in bodily form like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.” 23 Now Jesus himself was about thirty years old when he began his ministry. He was the son, so it was thought, of Joseph,”
The baptism happened BEFORE the Wedding at Cana. I had to work through that “time has not come yet” thing when I first ran across this weak translation that appeared to have Jesus disrespecting his mother.