For those who converted to Roman Catholicism, how did you test the veracity of the Marian dogmas?

Lolo asks:

For those who converted to Roman Catholicism, how did you test the veracity of the Marian dogmas?

I'm a revert from atheism. I became convinced of the truth of the Marian Dogmas in two ways.

1st. I was first convinced of the Doctrine of the Mother of God. I did not even consult Scripture for that one. I used what I later learned was Luther's syllogism.

Mary is the Mother of Jesus.
Jesus is God.
Therefore, Mary is the Mother of God.

Later, I noticed that although the terms, Assumption and Queen of Heaven are not used explicitly in reference to Mary, she is described as being in heaven and wearing a crown of twelve stars in Rev 12:1.

Revelation 12:1
King James Version (KJV)
1 And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars:

Then someone pointed out to me that one verse earlier St. John described seeing the Ark of the Covenant, but suddenly he started speaking about a Woman in heaven. This, of course, relates to the Doctrine of the Ark of the New Covenant:

Revelation 11:19
King James Version (KJV)
19 And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail.

Then, I noticed that Rev 12:17, speaks of Mary as mother of all who keep the Commandments and hold the Testimony of Christ:
Revelation 12:17
King James Version (KJV)
17 And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.

As I studied Scripture further, I noticed that the Word of God speaks of her in the highest praise. 

Luke 1:26-28King James Version (KJV)
26 And in the sixth month the angel Gabriel was sent from God unto a city of Galilee, named Nazareth,27 To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name was Mary.28 And the angel came in unto her, and said, Hail, thou that art highly favoured, the Lord is with thee: blessed art thou among women.


Let's break this down:
ANGEL GABRIEL
1. an angel is a messenger of God. That is what the word, angel, means.
2. this angel, Gabriel, is one of the four angels that stands before the throne of God.


WAS SENT FROM GOD
1. God sent this angel to Mary.
2. Since this angel is a messenger of God's, God sent Him to deliver a message.
3. Therefore, the angel was not speaking on his own, but was communicating God's message to Mary.
4. If we skip down to verse 28, we see that this was a message of praise (i.e. blessed art thou).
5. Therefore God praised Mary through His Angel.


That is great praise indeed. Do you know of any man whose praise is worth more than God's? In other words, what do you value more highly, the praise of man or the praise of God?
But, there's more. God sent the Angel to do His Will. What is His Will. Obviously, God sent the Angel to deliver a message of praise. Therefore it is God's will that the Angels praise Mary.


And there's yet more. Because the Holy Spirit inspired a holy woman to exclaim, ""Blessed are you among women, and blessed is the child you will bear! "
still in:
Luke 1:41-45
King James Version (KJV)
41 And it came to pass, that, when Elisabeth heard the salutation of Mary, the babe leaped in her womb; and Elisabeth was filled with the Holy Ghost: 42 And she spake out with a loud voice, and said, Blessed art thou among women, and blessed is the fruit of thy womb.
Should we break this down?
1. The Holy Spirit is God the Third Person of the Holy Trinity.
2. Therefore, God inspired Elisabeth to praise Mary.
3. This praise is inscribed in the Word of God for all generations.
4. Since Elisabeth is a member of the human race, then it is safe to conclude that God wills that men praise Mary.
5. And we find, again, that God praised Mary through His Saint. Saint Elisabeth praised Mary when she was inspired by the Holy Spirit to do so. That means that it is the Holy Spirit's praise which she passed on. That is why Scripture is called the Word of God. Because it is inspired by the Holy Spirit.


Need we say more? Let's do it anyway.
Mother of God
Luke 1:43-45
New International Version (NIV)
43 But why am I so favored, that the mother of my Lord should come to me? 44 As soon as the sound of your greeting reached my ears, the baby in my womb leaped for joy.45 Blessed is she who has believed that the Lord would fulfill his promises to her!” 

Lets break this down:
1. The word "Lord" is here mentioned two times.
2. In the second instance, it is an obvious reference to God. "Blessed is she who believes that the LORD would fulfill His promises." That is an obvious reference to God.
3. Therefore, then, what could she possibly have meant when she said, "mother of my LORD"?
4. Since she was inspired by the Holy Spirit to utter these words, she must have meant what is most obvious. Is Jesus, God? Yes. Therefore, the words she uttered could also be translated, "mother of my GOD".
5. So, God explicitly teaches us, in His Word, that Mary is the Mother of God.


Is there any higher praise than that?


And so, I became convinced by the reading of Scripture, that all the Catholic Dogmas about Mary are true.

Sincerely,

De Maria