"Yes, Lord, I believe!" the man said. And he worshiped Jesus. (John 9:38 NLT)
It's so simple that anyone can do it, even a child. God's salvation is available to all that "believe!" We're not talking about having faith in faith, but about relying on Jesus Christ and His finished work on Calvary as your only means of eternal salvation and forgiveness of sins. With your heart...just say what this man said, "Yes, Lord, I believe!"