Brother, what sins do you not turn from when you come to Christ? When someone turns to God, they turn from their self, and their sinful lifestyle. It's a surrender of their will to His will. God, when He forgives, He wipes their slate clean. So, in essence, salvation is repenting of all their sins they have committed.
There is no essence involved. If God wanted us to repent of sin He would have said so, but He did not. He said repentancxe towards God. One does not even have to undersand all their sins to repent towards God and repentance is not 50%, 75%, or 99%. It is 100% or it is not repentance. No one gets saved by almost turning to God.