Jacob was not alone. God is going to be with him.
This blessing reveals to Jacob: Who God is, the promise given to Abraham renewed, Promise to multiply their decendents and they will be a blessing to the world.
Jacob had met with God. He was given something for himself to trust in God, get to know God, he was not alone and everything will be fine for God is in charge.
He just had to begin the walk with God and God would carry him and fulfil the blessing. His conversion gave him an opportunity to get to know God personally. It is his choice to walk with God, God opened the door for him.