Right, we are all born into a Universe that has been affected by the Ancestral Sin - everything and everyone is subject to sickness, physical death, etc.
A child, like Adam and Eve, is created in the Image (we immediately have in full) and Likeness of God (our goal and our potential should we accept and strive after love of Him). Like Adam and Eve, we are all called to become gods, but this is not something we can achieve on our own - which is what Adam and Eve tried to do via their first sin - since God, as a result of their disobedience in striving to become god without God, removed them from direct contact with Him, meaning He would no longer show them the Way directly, by removing them from the Garden. We needed Mary, the first (& I think last) of the human race to choose of her own free-will to never sin - to give her “Yes” to God to allow Him back into direct contact with the Human Race via Jesus. Jesus came, told us what our potential is and how to achieve it with Him and gave us His Church to guide the Way. Full participation in the Divine Energies of God via the process of Theosis. He has given us the Medicine of Immortality, namely His Body and Blood in addition to the other Mysteries His Church provides us in addition to the spiritual help we receive from the spiritual fathers who have achieved this state while here on earth.
This is basic Orthodox Theology - how is it that you seem to Not know this? I don’t understand. Did you parents not take you to Church when you were growing up? Were you never exposed to your own Faith? How can you be looking to change your Faith, when you have not yet learned your own? This simply makes no sense to me. God bless you. I wish you the best on your journey.