No it's not.
In the passage you quote She is thanking God for the blessing of being a part of His plan for Israel. It doesn't mean she had a full understanding of what was going on. If you read further:
Luke 2:49-50 And He said to them, "Why did you seek Me? Did you not know that I must be about My Father's business?" But they did not understand the statement which he spoke to them.
I think she knew Jesus was meant to do something special in God's plan, but did not comprehend who he was.
Oh please. She’s visited by Gabriel, one of the four angels directly in front of God.
She is told she will bear “Luke 1 35
And the angel answering said to her: The Holy Ghost shall come upon thee, and the power of the most High shall overshadow thee. And therefore also THE HOLY THAT SHALL BE BORN OF THEE SHALL BE CALLED THE SON OF GOD.”