Did Incarnate Messiah Jesus at Age 12 Teach in Temple the Many Prophecies of His Coming as Lamb of Elohim?

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The Word (who is Jesus Christ) says that as a 12 year old boy, He was boldly teaching in the Temple in Jerusalem, so how do you suppose He broached the multitude of Old Testament prophecies about the Messiah who would come, particularly Daniel 9 which foretold the timeframe that He would be cut-off (about 20 years after HIs teaching in the Temple as a clearly gifted 12 year old teacher)? Do you suppose that He taught the Messiah must be among them already in order to be soon cut-off (then resurrected)? Many Jews knew that He had been born of a virgin which had been prophesied, also that He would be born in Bethlehem, so how many in the Temple calculated that He must be the Messiah?