Turn to God and place your faith in Jesus Christ alone for salvation. Good works and church attendance cannot save you. Salvation is received by faith, not earned.
“Believe on the Lord Jesus Christ, and thou shalt be saved” — Acts 16:31 (KJV)
“For whosoever shall call upon the name of the Lord shall be saved.” — Romans 10:13 (KJV)
You can call on the Lord in prayer, acknowledging your sin and trusting Him to save you. It is faith in Christ—not a particular set of words—that matters.