Here's the good news! God doesn't just leave us to die, instead He does the opposite! He offers us eternal life with Him in heaven even though we don't deserve it (that's called grace). But how? Did God just change his mind? No, remember God is just and holy. He didn't just let our sin slide - someone had to pay the price. And that someone was His Son, Jesus.
“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life" (John 3:16).
Some believe Jesus was a prophet and a good teacher, but Christians believe he is much more. He is God in the flesh. The same God who created the heavens and the earth! When Jesus died on the cross and rose back to life three days later he became our substitute and paid for all of our sins - past, present, and future. At that moment we were made right with God and were given a perfect record that we can never mess up. All we have to do to recieve this free gift is to believe what Jesus did for us.
Remember there is nothing a human can do to make things right with a perfect God. If Jesus was just a man, and not God, then his death did nothing for us. We'd be in the same position as before - desperate and in need of a savior. But if he was God and he lived a sinless life, then his sacrifice was sufficient and he has the power to save us all. The last step to becoming a Christian is accepting Jesus as the one who saves you.