God is the all powerful ruler of the universe — but He also wants to be your heavenly Father! The key for us is to acknowledge that we have sinned and to ask Jesus Christ to be our Savior.
When we truly ask Jesus Christ into our lives to be our Lord and Savior, our sins are forgiven and we become a child of God. God sends us His Holy Spirit to live in our lives; and the fruit of the Holy Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control.
So we can have peace with God because our sins are forgiven, and we enter into a new relationship with God as His children. Just as an earthly father love his children, how much more does our heavenly Father love us!
And by the power of the Holy Spirit, we can know and experience God's peace in our lives in our hearts, regardless of the circumstances. God loves you and wants you to know His peace and joy in your heart and life!