You actually have Jewish theology behind you.
In Judaism there is no doctrine of "Original Sin," and therefore none of the texts in the Hebrew Scriptures were written with this view in mind nor can be honestly read with this doctrine as an intention.
It is there, just undeveloped by the Jewish sages:
Psalm 51:5 states that we all come into the world as sinners: “Behold, I was brought forth in iniquity, and in sin my mother conceived me.”
Genesis 8:21 declares, “. . . the intent of man’s heart is evil from his youth.” Jonathan Edwards, in his classic work The Great Christian Doctrine of Original Sin Defended, remarks that on this verse: “The word translated youth, signifies the whole of the former part of the age of man, which commences from the beginning of life. The word in its derivation, has reference to the birth or beginning of existence . . . so that the word here translated youth, comprehends not only what we in English most commonly call the time of youth, but also childhood and infancy.”
Psalm 14:2–3 we read: “The Lord has looked down from heaven upon the sons of men, to see if there are any who understand, who seek after God. They have all turned aside; together they have become corrupt; there is no one who does good, not even one.” Here again we see unrighteousness as a property of the human race: “they have all turned aside . . . there is no one who does good.”
Job 15: 15 “Behold, He puts no trust in His holy ones, And the heavens are not pure in His sight; How much less one who is detestable and corrupt, Man, who drinks iniquity like water!”
Jeremiah 17:9 says that “the heart is more deceitful than all else and is desperately sick; who can understand it?” This seems to assume original sin — wickedness is a property of the human heart.
Ecclesiastes 9:3 declares a similar truth: “. . . the hearts of the sons of men are full of evil, and insanity is in their hearts through their lives.”
Without the doctrine of Original Sin (sometimes called ancestral sin) the whole world takes on an up-side-down appearance. When we accept that none of us (including unsaved religious people like JW's) really want or desire God, only then can we correctly perceive ourselves and others.
When I was a JW, I worked hard for god. But, it wasn't for the God of the bible, it was for the god described by the Watchtower. It was for a false god who wanted my works. The God of the bible says my works are an abomination to try and use as a means for avoiding judgment.
To think of God as other than he really is - is idolatry. Only an understanding of Original Sin can make this make sense.
Another consequence of the fall of man is the so-called "curse on creation," described in Genesis 3:17-19. Since life and blessing come from God, and God inhabits the spiritual realm, earth's reduced fecundity after the fall can be thought of as a disruption of the power flow of the sustaining energy of the spiritual realm into the physical realm of our "two-storied" universe. The previously perfect "coupling" between the spiritual and the physical dimensions was reduced or disrupted by Adam's sin. Active evil also began to operate in the spiritual world as well as in the physical.
...And to Adam God said, "Because you have listened to the voice of your wife, and have eaten of the tree of which I commanded you, `You shall not eat of it,' cursed is the ground because of you; in toil you shall eat of it all the days of your life; thorns and thistles it shall bring forth to you; and you shall eat the plants of the field. In the sweat of your face you shall eat bread till you return to the ground, for out of it you were taken; you are dust, and to dust you shall return."