You will likewise note that it says nothing about there being a mediator between man and Jesus. It also says nothing about there being no mediator between man and Mary.
When Jesus saw his mother, and the disciple whom he loved standing near, he said to his mother, "Woman, behold, your son!" (John 19:26)
Maybe you could pray to the beloved disciple to intercede with you to Mary, to intercede with you to Jesus, to mediate between you and God.
Or, you could pray to the Father directly.
Pray then like this: Our Father who art in heaven,
Hallowed be thy name.
Thy kingdom come.
Thy will be done,
On earth as it is in heaven.
Give us this day our daily bread;
And forgive us our debts,
As we also have forgiven our debtors;
And lead us not into temptation,
But deliver us from evil. (Matthew 6:9-13)
...how much more will your Father who is in heaven give good things to those who ask him! (Matthew 7:11)