Nope, unfortunately, I did read all the posts, and your literal comprehension of 2 Peter 3:8 is incompetent and absurd!if you read all of the conversation from the beginning, you would know that you don't know what you're talking about.
Your points about the inability to measure a day, due to the reference points not even being in existence yet, initially has merit. And, that you're skepticism of the entire veracity of the creation account, because there was no one there to witness it, or for God to explain it to, equally raises a valid question.
But, in a forum full of Christians, who almost universally accept Biblical revelation, and the maxims of God's character (eg: omniscience), we trust that either, the author of Genesis received the information via direct revelation, or someone prior to him, even before the flood, received it by revelation and handed it down orally. Either one is feasible.
Secondly, if it was imparted to man by divine endowment, then God, who is all knowing, may define the logistics of what took place without the requirements of special instruments, measuring tools or reference points.
He knows exactly how long it took Him to create anything, whether or not he had created the solar system yet, or carried a stop watch with Him.