Prayer Log

I am not good at praying out loud. For all of the beautiful and poignant prayers I have been exposed to in church, it has not prepared me for the casual personal prayers encountered in the prayer group at school. I don't necessarily view this as a bad thing that I am not strong at praying casually, as I don't know we should treat God as "Papa God" as I have heard in some prayer groups. He is the one who made the universe, he is the one who brought the Israelites out of bondage. He destroyed the earth in a flood. He concurred Satan and death on the cross. This is not the type of person I want to high five. This is a God I am afraid to look up to. This is a God that I love because He first loved me. So when I pray out loud, it is usually from an old church prayer or hymn, or one of Luther's prayers. This I feel captures the reverence that is appropriate for my Heavenly Father.
Still, this leaves me wanting a more personal approach when speaking out loud in group. I have personal talks with God in my head, but I am uncomfortable speaking out loud with people. I'd like to try to get better at this while not sacrificing reverence.