The Good News, also knows as the Gospel of Jesus Christ, is that God loves us and has provided as way for us to be saved and united with Him. Jesus is the Way, the Truth, and the Life, and through Him we have a clear path to God, the Father.
We were born into a world that has rejected God and is full of sin. You can see it all around you, and you know it is within you. Even when you try to be "good", it's not possible to be good enough or clean enough for God. Nobody, in and of themselves, can be. Before Jesus came to Earth, God provided ways for people to atone for their sin, such as animal and food sacrifices, to try to get closer to God, but those were temporary solutions. But God was just preparing us for his ultimate plan: Jesus.
Long before this world was even made, Jesus existed with God and was one with God. He is described as the "Son of God". He was born a physical being on this world over 2,000 years ago, a birth foretold by many scriptures and combining both spiritual and physical natures, and He lived among us for several decades, teaching first-hand many things about God's character and how to live a good life, and healing people both physically and spiritually. Then when the time was right, God allowed him to be killed -- crucified on a cross meant for society's worst offenders. This death was intended as the ultimate sacrifice, far better and more permanent than any animal or food sacrifice we could ever imagine, doing away with the need for such sacrifices ever again. But God is more powerful than death, and on the third day Jesus was resurrected back to life, spent a little more time among us, and then returned to God, the Father, leaving us with the Holy Spirit, who is known as our Helper, to guide us throughout our lives. Because of Jesus' sacrifice for us, we have been adopted into God's family and can be sure of everlasting life with God, by acknowledging and accepting Jesus.
You can know the peace that a relationship with Jesus, through the Holy Spirit, can give you. We can help you.