I suppose the 1st concept of God was "given" to me by my family and the Catholic religion of my childhood. This was mostly "the Old White Guy, with the long, grey beard." It had lots of anthropomorphic features, good and bad!
Then as I reached college, alcohol, marijuana, disco, and science, I had an epiphany, that there is a huge, infinite universe, up there. This occurred around the age of 18-19 when I was visiting the local planetarium to view the planets, stars, and other celestial bodies, on a weekly basis. The Universe became full of wonder, awe, and mystery. And so did God.