So is that all the new Christian must believe? God is creator of the Universe and all that is in it including humankind. God loves His creation including the humans He created "in His own image". Being in God's image means we are allowed to have free will. God does not direct us or make decisions for us. Humankind has chosen to reject God. We call that rejection of God, sin. Even though we regularly reject a relationship with God by our sins, He continues to pursue us. He continues to want a relationship with us. But having that relationship requires a way to wipe out the sins that come between us and God. God originally instituted a system of blood sacrifices as a way for us to receive the forgiveness of our sins. When that method proved unworkable, God developed another method. God's plan includes providing a perfect sacrifice for the forgiveness of our sins. This forgiveness is available to all who chose to accept it. the sacrifice needed to be a perfect sacrifice of something so valuable it would cover the sins of all the people who ever lived, the sins of people living at the time and the sins of all people who would live afterwards. That perfect sacrifice was Jesus. By the blood shed at His death on the cross, all the sins of the world were forgiven. all we need do to receive this forgiveness is believe in the name of Jesus and accept His sacrifice.
But is that all there is to the story?