Fisherman, this is how I see and experience it. I don't see it as time but rather different levels of time. God created everything, so time as we know it would have started then. Daniel told Nebuchadnezzar: "He changes times and seasons, deposing some kings and establishing others. He gives wisdom to the wise; he imparts knowledge to those with understanding" (Dan. 2:21 NET). God can change times and seasons at will because He created them.
Time for us is absolute. That's all we know. For God it's relative, judged or measured by comparing it to different timelines and eternity. To understand His view of time one would need "clear thinking," as you say and help from His Spirit and Word. You mentioned the "creative" days. For us it would be a long time. For God six days have passed. We find ourselves in the seventh day, which is still ongoing. Lots must still happen. In that sense, Jesus is Lord of the Sabbath. He will finalize what God has started (Gen. 2:3; Matt. 12:8; cf. Hebr. 3:11, 18; 4:1-11).
You mentioned Peter and God's patience. This made me think of Habakkuk. Also he could not understand God's patience until God reassured him: "Then Yahweh answered me and said, “Write the vision and make it plain on the tablet so that ⌊it might be read quickly⌋. a For there is yet a vision for the appointed time; it will give witness to the end, and it will not lie. If it tarries, wait for it, for it will surely come and not delay."
a. Literally “it might run reading upon it” [W. Hall Harris III et al., eds., The Lexham English Bible (Bellingham, WA: Lexham Press, 2012), Hab 2:2–3.]