There would seem to be a whole heck of a lot of holes with this method of being saved.
Actually only one step was left out: First, I acknowledge that Jesus is the Son of God, born of the virgin Mary and that the Holy Spirit is alive in my heart. Second, I ask God the Father forgiveness of (all) my sin. Third, I promise to never sin again.
I'm human and I sin everyday but I have been changed from the self-centered, angry, sarcastic, rude person I used to be.
God knew in the Old Testament days, with the children of Abraham that we couldn't obey all of God's commandments so, in the New Testament days, He sent His Son Jesus, to shed His blood on the cross of Calvary.
This replaces the laws of Moses where everyone had to bring the 'first born lamb', without spot or blemish, to the High Priest to be offered as a 'sweet aroma' to God.
There are those who have heard about the religion and don't think it's real thus wouldn't as for forgiveness since we think there is no one there to ask forgiveness from.
For now, God is waiting for everyone on earth to hear the Gospel of Jesus and to come to a decision.
The Holy Spirit doesn't shout like "John the Baptist" did in the wilderness but instead whispers, like when your conscious tells you not to kill the neighbor's cat because it's wrong.
The Bible says it's written in such a way as to confound the wise. Reading the Bible is great but that alone won't save your soul.
The way to the Father is through the Son. The way to the Son is by invitation by the Holy Spirit.
There are those who would do something that the Bible would regard as a sin but that person would not so they of course would not ask forgiveness for an act they don't see as a sin.
These are called sins of 'omission', sins are 'committed' when the person, as a believer, is conscious of the sin. Sins of omission from a believer is when they know it's a sin but they lie to themselves, the Holy Spirit and to God by 'overlooking' them in their prayers until something bad happens, like what happened to King David when he saw Bathsheba bathing on the roof top and 'had to have that woman'.
There are those who never heard of this thus even if they would believe wouldn't because they wouldn't think to.
With non-believers, they don't know they're committing a sin, "the lost don't know they're lost!" They, just as believers, have to be invited by the Holy Spirit before they can make a decision to believe in God.
There are those of other religions who of course wouldn't ask forgiveness from another god.
They are also 'invited' by the Holy Spirit'.