While principalities of darkness and people work to obfuscate, change, and confuse the meaning of repentance, you already know the truth. You know in your heart what repentance means, because repentance is a matter of the heart.

Repentance means to be sorry for your sin, desiring to turn from evil behavior unto righteous living with a Holy God.

You know inherently that you need to be cleansed of past sins. Which is why after learning of the grace of God and good news of salvation, we seek out confession and water baptism.

Proverbs 28:13 KJV says, He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy. And 1 Corinthians 11:31 KJV tells us, For if we would judge ourselves, we should not be judged.

The heart convicts, while the mind and spirit can produce change. Call upon the Lord. God himself will help you walk in the light.