I'll repeat the structure I devised, then post the Bible verses which I consider to be relevant to a consideration of the named Mystery.
The Sign of the Cross.
The Apostles Creed.
One Our Father.
One Hail Mary.
One Glory Be.
One Oh My Jesus ("Oh, my Jesus, forgive us our sins," etc.)
Then, the announcement, "First Joyful Mystery: The Annunciation."
Then, one Our Father.
Then, I actually really do "contemplate the Mystery."
Then, after contemplating the Mystery, I say one Hail Mary, one Glory Be, and one Oh My Jesus.
Then I repeat the cycle, beginning with the announcement of the next Mystery, and the Our Father, followed by contemplation of that Mystery, and so on.
BIBLE VERSES TO CONTEMPLATE:
Jesus did not need baptizing. If He did, then He was not the "blemishless lamb" whose death purchased grace for mankind.
So, probably He did what He did to institute the sacrament.
He may also have been talking to us, with His actions. Compare Matthew 3:16 with the verses at 1 Kings 17:1, and 18:41-46.
Remember that the sea symboilizes the Sea of Damnable Souls in typology.
But, why would Christ come OUT OF the Sea of Damnable Souls, in His Baptism.
Paul figured it out, at 2 Corinthians 5:21. Though sinless, He ended up being treated as though He were sin, itself.