I actually very much agree with the apophatic approach, as presented by Kallistos Ware in "The Orthodox Way" (I have been doing some reading). Its just that, this is the way I was taught the Trinity since my earliest questionings of it, and it is the what I have believed since I have discovered Orthodoxy.
That is one of the adventures of living - we find out stuff that overturns our misconceptions. May I encourage you to read further.
I was taught under the same regime as you and it took a while to swing my thinking onto a different plane. Don't expect to grasp it all in one serving - even allowing for the impatience of youth.
The concept of the Trinity actually is derive from tradition. This is not an easy concept to grasp but one which lies at the heart of Orthodoxy.
Tradition is not what has been said - it more often what is not said - but which is known. In other words, if you go looking for it you will not find it. Certainly Tradition is 'endowed' with scripture but as Vladimer Lossky notes, Tradition also comprises
unwritten 'other words', that is, all that the Church can add to the Scriptures.
An example. We might wonder how it was that the early Christians took it upon themselves to change the observance of the commandment to 'keep the Sabbath' to 'keep the first day of the week Holy'. Now one can fall into the legalist trap and quote various pieces of scripture and even point to the practice that Jesus 'observed the Sabbath' to prove a point. But, without going into a doctrinal thesis, I, and I suspect so do you, know exactly why the change was made. That is what Lossky mean by 'Tradition'.
But in case you think I am doing nothing more than exercising my own opinion I draw attention to the work of Jaroslav Pelikan,
Imago Dei, (1990). In an an argument that is not all that much different to the Trinty, namely the use of icons, Pelikan draws attention to the work of Basil of Caesarea (374)
On the Holy Spirit. What Saint Basil draws our attention to is patristic Father's
reliance on the unwritten tradition in order to successful argue for, following ambiguity of Nicaea (325),
the coequality of the Holy Spirit with the Father and the Son was vindicated both by the written evidence of Scripture and by the traditionary evidence of church custom (p 63-64).
The point being made is that looking for hard evidence in the form of written text is not always in the interests of theology or good spiritual practice.