There are many verses that might easily confuse and bewilder us if we attempt to solve their conundrum in isolation - without the concert of many other texts that help to provide a frame of reference.
Quite often, a Greek analysis alone is insufficient to render a truthful or contextual meaning to words written many centuries ago.
This instance is one where context and concert must be employed to gather the information needed.
And you, child, will be called the prophet of the Most High; for you will go before the Lord to prepare his ways. Luke 1:76
Who is this Lord?
Luke 1:31-3 And behold, you will conceive in your womb and bear a son, and you shall name Him Jesus. 32 “He will be great and will be called the Son of the Most High; and the Lord God will give Him the throne of His father David; 33 and He will reign over the house of Jacob forever, and His kingdom will have no end.
Clearly Luke is not talking about Yahweh, the God of Israel, but His son.
v42 Blessed are you among women, and blessed is the fruit of your womb! 43 “And how has it happened to me, that the mother of my Lord would come to me?
Again, this is not God, Yahweh, but another Lord. A human child by miraculous events was promised and believed on in faith.
v45 And blessed is she who believed that there would be a fulfillment of what had been spoken to her by the Lord.”
This last 'Lord', is a reference to the angel Gabriel - a messenger of Yahweh - whose words are as good as God's. Not that Gabriel IS God, but when he speaks, it's the Lord God speaking.
v4 6And Mary said: “My soul exalts the Lord, And my spirit has rejoiced in God my Saviour. (Yahweh)
All the way through to v55
As He spoke to our fathers, to Abraham and his descendants forever. (still Yahweh)
And as Hebrews mentions, confirming the one who spoke to the prophets etc and the one who is now speaking in these last days - not Yahweh per se, but the son, Jesus. Continuing with the accepted practise of who God sends, speaks as if God is speaking through them.
God, after He spoke long ago to the fathers in the prophets in many portions and in many ways, 2in these last days has spoken to us in His Son, whom He appointed heir of all things
John 8:28 I do nothing on My own, but speak exactly what the Father has taught Me
John 14:24 The word that you hear is not My own, but it is from the Father who sent Me.
There is no confusion with Mary or Elizabeth who was who - they knew who their God was, Yahweh, and they knew who He was sending. Elizabeth was 'filled with the Spirit', Mary was spoken to by God's angel and God's presence with her was strong. The child from her would be holy and have many roles of leadership and kingship - as prophesied and promised. He would be the Lord God's Lord.
v67 Zacharias was filled with the Holy Spirit, spoke of his own son, soon to be - John. He proclaimed Yahweh as the God of Israel, He spoke by the mouth of His holy prophets, The oath which He swore to Abraham our father, And you, child, will be called the prophet of the Most High...
For you will go on BEFORE THE LORD TO PREPARE HIS WAYS.
To clarify, we see from Matt 11
0“This is the one about whom it is written, ‘BEHOLD, I SEND MY MESSENGER AHEAD OF YOU, WHO WILL PREPARE YOUR WAY BEFORE YOU
Who is talking? Yahweh is - He is sending HIS messenger to prepare a way before another... not for Himself. Jesus is using this prophecy to show who John the Baptist is - the one preparing the way for him - the son of God.
No one prepares the way for God, but for His son - absolutely - as prophesied.
No one makes the paths straight for God - for His son they do.
Matt 3:3 Prepare the way of the Lord; make his paths straight
The son of God - the one who died, who was raised by his Father and God, who was appointed heir of all creation, who was made Lord and Christ, whose very life was given by the Father, twice, and given the Spirit also twice. He is the Lord of Life because the Father decreed it so, having accomplished victory over not just sin, but death and evil itself through him.
As Luke has noted, by including various prophecies concerning the coming Jesus, or Lord, as he would be also known. There are other indicators that Jesus would be Lord, but carefully distinguished from God - the Lord God, Yahweh. God's people knew they had one God - His name was Yahweh, the Almighty and many other names or titles. He spoke through the prophets until He would send His son Jesus to do the speaking (Heb 1:1). They were well versed in the prophecies and understood the significance of the one to come. Those who were made aware, like John the Baptist and others, knew who this new one was.
"Behold, I am going to send My messenger, and he will clear the way before Me. And the Lord, whom you seek, will suddenly come to His temple; and the messenger of the covenant, in whom you delight, behold, He is coming," says the LORD of hosts. Mal 3:1