Soteriology = the doctrine of salvation
Perhaps it might be best to ask an Orthodox Priest how to be saved first.
Repentance is the first step toward salvation.
Saint Nektarios of Aegina wrote a small book on Repentance and Confession
It has been translated and published by Saint Nektarios Greek Orthodox Monastery.
Copyright 2002, Roscoe NY
If you enter "Repentance and Confession, St. Nektarios" into your search window,
you will find lots of book dealers, which usually sell this book for $12.00.
St. Athanasius once said: "God became man, so that man might become God."
This refers to the fact that at our Baptism, we are purified as we are washed in the Holy Waters and put on Christ; at our Chrismation, we are illuminated as we are filled with the Holy Spirit; and at our Holy Communion we are sanctified as we receive our Lord God and Savior Jesus Christ into our very being. This continual purification, illumination and sanctification opens us up to theosis whereby we become God-like, not in God's nature or very essence, but through His Divine Energies through which Sanctifying Grace is given to us enabling us to become like God.