Why are you (still) a Christian?

[Bucky Ball]

You're pretty good at this. Inadvertently? Reluctantly? 

Spirit creatures don't need to talk to communicate, so although the spirit beings created by the spirit being that created the universe, Jehovah God, needn't have talked at all until the 13.8 billion estimated time it apparently took for the first talking person did emerge. Obviously since that person was the first.

According to the description we have, God was a talking person, at the very beginning of the universe.

Genesis 1:3 And God said, Let there be light: and there was light.

That is very interesting to (real) scholars. 
The long involved tradition of what the Hebrews considered as the "word" of their god being powerful is slightly different  and you raise an important point. 
Most of the ancient Near Eastern gods were said to have created the world/universe in the many creation myths, (of course no one knew the universe was what we know today it is), by their "word" which was considered as having "power". The ancient Jews believed in the power of their god's "word".  For some of them (the Egyptians for example) the "words" were "magical". IE they had to have spoken the (correct) "magical words" (the exact words which held the magical power) to cause the universe to come into being. In Hebrew thought, their god's word just simply had "power" (apparently not in a magical sense), and it's a long story, too long for here. So the god had to intend the creation action, and the text does say the "word" has power. So in that sense you are totality correct. The power of Yahweh's "word" is there, throughout the OT. 

The fact that he created light first in their cultural myths was culturally important, and there are many explanations for why that might have been written that way.