Sounds like what happens to a lot of people. You accept Christ but there is no immediate change outside of that, you have to struggle for a while before you can say you have truly left the world behind.
Obviously this won’t happen to a lot of people who will struggle with sin and temptation to sin all their lives.
Obviously this won’t happen to anyone, because we all struggle with sin and temptation and continue to sin all our lives.
One can only hope to sin far far less.