Wisdom hath builded her house, she hath hewn out her seven pillars:2
She hath killed her beasts; she hath mingled her wine; she hath also furnished her table.3
She hath sent forth her maidens: she crieth upon the highest places of the city,4
Whoso is simple, let him turn in hither: as for him that wanteth understanding, she saith to him,5
Come, eat of my bread, and drink of the wine which I have mingled. (Proverbs 9:1-5)24
But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God. (1st Corinthians 1:24)
The great cathedral of Constantinople was called Hagia Sophia
or, "Holy Wisdom", and was called such after Christ - Christ, the Holy Wisdom. This is because the Church, as does the New Testament (both explicitly and implicitly) recognizes that Christ is the "Holy Wisdom" spoken of in the Old Testament.
The passage I quoted from Proverbs chapter 9, appears to be as clear a prophecy of the Orthodox Church as can be said to exist - the significance of the seven great, and ecumenical Councils ostensibly being pointed to by the text, just as the Church (in such great and early Fathers like St.Irenaus) pointed to the "four beasts" surrounding the Divine Throne in the Apocalypse of St.John as being the four Holy Gospels. The seven councils like pillars of the Church, just as the Apocalypse also pointes to the Twelve Apostles as being pillars of the Church (the "Heavenly City").
While Orthodoxy is by no means minimalistic, it can be said that some truths are more foundational and in the forefront than others - where as other truths can even be said to be only acquired or at least understood with the passage of time and the growth in grace and understanding. In terms of those most basic truths, one will find much in the way of official definition in those seven Holy Councils.
Other sources would be those local Synods (such as the Palamite Councils) which gained "universal" or "ecumenical" status by default, through the universal acceptance of their teaching.
This great dogmatic teaching, however, is made more accessable in terms of it's practical expression - the Liturgy of the Church (which is not simply the Eucharistic Liturgy, but the entirity of the Church's public, and to a great extent even, private worship), and the local confessions and catechisms which have been used in the instruction of the faithful. This is the most common way the Church's teachings, including their universally agreed up defition, make their way to the people. However, everything in Orthodoxy is a vehicle for communicating such things.
Thus, if you're looking for an accurate (and detailed) expression of the Church's teachings appropriate for a reasonably intelligent adult catechumen/neophyte, I'd recommend...
a) attending liturgical services, involving yourself in the life of a parish Church, and finding for yourself a spiritual father who can offer some guidance.
b) getting a hold of one of the many good catechetical works on this subject. I'd particularly recommend Fr.Michael Pomazansky's Orthodox Dogmatic Theology
(published by St.Herman of Alaska Brotherhood
) or Archpriest Seraphim Slobodskoy's The Law of God
(whose publisher escapes me, but I know you can order it through skete.com