“I always read that God’s first act was “Let there be light.””
Nope, check it again:
“1 In the beginning God created the heaven and the earth.
2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
3 And God said, Let there be light: and there was light.”
You are wrong.
Time to admit it.