Take all the time you want to. I am also an "Old Earth" believer but that has nothing to do whatsoever with your thesis.
Has it dawned upon you that in the BILLION os years past, GOD HIMSELF could have been the light of the universe????
Then just as well as that, the sun was begun on the first day but not completed until the fourth. The idea behind this view is that God's creation was a process. Yes, I know that there is no Scripture to support that.
The Scofield Reference Bible says:
Neither here nor in verses 14-18 is an original creative act implied. A different word is used. The sense is, made to appear; made visible. The sun and the moon were created in the beginning. The light of course came from the sun, but the vapour diffused the light. Later the sun appeared in an unclouded sky (
The Scofield Reference Bible, edited by C.I. Scofield, New York, Oxford University Press, 1909, p. 3, note 4).
You say you are old earth, and then you follow up and defend young earth by saying the sun was hidden by clouds.
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Then....if you base your whole thesis on the absense of the Sun's light, then you need to explain the Bible fact thatthere will be light without the sun in the future New Jerusalem.
And there shall be no night there: They shall need no lamp nor light of the sun, for the Lord God gives them light. And they shall reign for ever and ever (
Revelation 22:5).
The sun shall no longer be your light by day, nor for brightness the moon shall give light to you; but the Lord will be your everlasting light (
Isaiah 60:19).