Jesus appeared first to Mary Magdalene because she was the person who was closest to him. When someone dies, you normally inform the next of kin who is closest to you before anyone else.
Mary was the closest because she was his twin soul, also called his twin flame.  When God created the world, he created two spiritual beings who hold the masculine and feminine polarities. In the Bible, these beings are referred to as Alpha and Omega.  There was another reason why Jesus appeared to Mary Magdalene before he appeared to his disciples. One of the main purposes behind his mission was to reinstate women in their rightful role and position.

Father, forgive them, for they do not know what they do, truly, I say to you, today you will be with me in Paradise, Jesus said to his mother: "Woman, this is your son".
Then he said to the disciple: "This is your mother, my God, my God, why have you forsaken me, I thirst, When Jesus had received the wine, he said, it is finished";
and he bowed his head and handed over the spirit, Jesus cried out in a loud voice, Father, into your hands I commend my spirit, Jesus fulfills His mission, and as He says so clearly in John's Gospel, He can now return: "I came from the Father and have come into the world; again, I am leaving the world and going to the Father (John 16:28)."
Jesus practiced what He preached: "Greater love has no man than this, that a man lay down his life for his friends