I have read the scriptures about mary many times…she is the mother of Christ and I respect her for that.
I look forward to meeting the saints on the other side when I have absented my own body.
I find no scriptures that instruct us to communicate with the dead. That goes for prayers to Mary and any of the dead saints, which I believe are false teachings and false doctrines.
Yes God is the God of the living ( Abraham etc. ) and the spirits live on the other side but that is the spirit world and is separate from ours. God intended it to be that way and why instructions in Leviticus and Deuteronomy. By communicating with the dead, one opens themselves up to deceiving demons.
Jesus ascended into Heaven and he sent us a Teacher and a Comforter, the Holy Spirit.