I think Mary was a blessed women. She got to be the person that birthed the son of God. She also got to see angels before her. However, I think she is no more than any of the other saints. Should we worship Moses who stood on holy ground in the presence of God. No. Should we worship Samuel who spoke to God audibly. No. Should we worship Noah and his family who God chose to survive when he decided to destroy the rest of the world due to corruption. No. Should we worship angels in which we have been instructed not to in the bible. Then neither should we worship Mary. She was chosen by God, but she's not the Chosen One. That title is for Jesus.
Throughout the bible, the theme is that she was blessed and found favor with God, but that she is only a woman and not to be worshipped. Examples:
Luke 1:30 But the angel said to her, "Do not be afraid, Mary, you have found favor with God.
Luke 11:27 As Jesus was saying these things, a woman in the crowd called out, "Blessed is the mother who gave you birth and nursed you."
Matthew 13:55 "Isn't this the carpenter's son? Isn't his mother's name Mary, and aren't his brothers James, Joseph, Simon and Judas?
Mark 6:3 "Where did this man get these things?" they asked. "What's this wisdom that has been given him, that he even does miracles! Isn't this the carpenter? Isn't this Mary's son and the brother of James, Joseph, Judas and Simon? Aren't his sisters here with us?" And they took offense at him.
Matthew 10:37 "Anyone who loves his father or mother more than me is not worthy of me; anyone who loves his son or daughter more than me is not worthy of me;
Matthew 12:46 While Jesus was still talking to the crowd, his mother and brothers stood outside, wanting to speak to him. 47Someone told him, "Your mother and brothers are standing outside, wanting to speak to you."[g]
48He replied to him, "Who is my mother, and who are my brothers?" 49Pointing to his disciples, he said, "Here are my mother and my brothers. 50For whoever does the will of my Father in heaven is my brother and sister and mother."
The last bible quote I mention is probably the most important. It's also repeated in the bible (Mark 3:32, Luke 8:19) which means that it is significant. Jesus is basically saying that Mary is no greater than anyone else in whom believe in him. She is a believer and to be respected for her role, but she is not holy. She sinned just like us and must rely on the salvation of Christ just like we do. Due to all these examples, I do not think we should pray to Mary.
BTW. I was a Catholic most of my life and prayed to Mary many times. It wasn't until I read the bible a few times that I felt that it was wrong.