Conversion is change. I recently read the 21/90 Rule. It means it takes 21 days to change a habit and 90 days to change a lifestyle.
Personally, conversion indicates something that is deep.
Like the Conversion of Saint Paul, the feast we celebrate today. From being an ardent prosecutor of Christians, he became a passionate follower of Jesus.
My son ordered a portrait of the Conversion of St. Paul by Caravaggio years ago, and it arrived on the day his good friend instantaneously converted from atheism to Christianity.
God has a plan for everyone. And stories of conversion to him are always a wonder to share.