God love you so much that He sent His one and only son Jesus to die for you. If you believe in Jesus, you will be forgiven and enter into a personal relationship with God.
For this is the way God loved the world: He gave his one and only Son, so that everyone who believes in him will not perish but have eternal life. (John 3:16 NET)
Now to believe in Jesus means to transfer your trust from yourself and place it all on Jesus and his death for you.
Believe on the Lord Jesus Christ, and you will be saved, you and your household. (Acts 16:31 NKJV)
God wants to give you the gift of forgiveness. The gift was paid for by the death of Jesus. All you need to do is receive the gift by transferring your faith onto Jesus.
For by grace you are saved through faith, and this is not from yourselves, it is the gift of God; it is not from works, so that no one can boast. (Ephesians 2:8–9 NET)
You express your trust in Jesus through a simple prayer like this:
"Dear Jesus, I know I am a sinner separated from you. I know I can’t save myself. I know Jesus died for me and rose from the grave. I transfer my trust onto Jesus and trust him alone as my personal Savior. Thank you for forgiving me and for my new relationship with you. In Jesus name, Amen."