The Bible has quite a bit to say about Mary and you can read this for yourself in the gospels, especially in Luke 1-3 and some in Matthew 1-3. But Scripture does not affirm what is believed about Mary by the Catholic church. She is not the mother of God, only the mother of the humanity of Christ. Mary is not a mediator between God and man, only Jesus is the mediator between God and man. “For there is one God, and one mediator also between God and men, the man Christ Jesus” (1 Tim. 2:5).
The Bible says nothing about Mary being ascended into heaven in a special way. She went to heaven as all do through faith in Christ as God’s Son who died for our sin, including Mary’s. Her conception was by the Holy Spirit, as explained in Matt. 1:20 and Luke 1:35, but other than this being a miracle work of the HS, we are given no details.
In Luke 1:28, she is called “favored one” (literally, “endowed or filled with grace”) but only in the sense that God, by grace chose her to be the human mother who would give birth to the Christ child. This same idea and word is used of all believers in Ephesians 1:6. To say any more than this is to add to what the text says and this is what Catholicism has done.
Mary is mentioned in other places in New Testament, but never in a way that supports her exaltation.