That is a great first question because it comes naturally from the very beginning of Genesis, and it shows exactly what your site is about:
You are reading the Bible, noticing something, asking an honest question, and then digging into it.
A good first post title could be:
Genesis 1:3–19 — Why Was There Light Before the Sun?
Your question on the page could be:
In Genesis, God creates light on Day 1, but the sun, moon, and stars are not mentioned until Day 4. So where did the light come from before the sun existed?
That’s perfect for your style because it is not disrespectful. It is just a real question someone might have while reading.
I’d make the first post something like this:
Scripture Focus: Genesis 1:3–19
Main Question: Why was there light before the sun?
What stood out to me: God creates light before creating the sun, which made me stop and wonder what Genesis is trying to show us.
Deep Dive: Look at possible explanations: God as the source of light, Day 4 assigning purpose to the sun/moon/stars, and the structure of Genesis 1.
My Takeaway: Maybe Genesis is teaching that the sun is not the ultimate source of life and light — God is.