None of these beliefs are far from mine. I go for 8000 years rather than 6000. And there are many Christians like me who try to interpret the NT through an OT lens since that's what Jesus and the disciples would have done.
(RE Genesis 2's "mist": I've been to the Persian Gulf and have seen the faint mist that constantly rises from the waters. It's usually 90% or more humidity and damn hot, and the Gulf smells like mildew.)
The reason why people with boats didn't survive is because their boats were actually rafts made of reeds and waterproofed with a mix of tar and cow dung (houses were built the same way). They're useful for getting from one island to the next for trading, and they never need to be water-worthy for any length of time since they can just make another one in a matter of minutes or hours. No reason to think they were anything more than disposable.
The "ark" built by Noah would have been made of wood, not reeds (Genesis says "gopher wood", but nobody knows what that was. In 3500 BC, Sumer imported about a dozen different kinds of wood for building from Iran (Aratta) and at times made treks into the Atlas Mountains for cedar (see the Sumerian version of "Gilgamesh and Huwawa" linked below). Another reason they would not have survived is because the flood lasted 370+ days, and those little river boats couldn't carry supplies for that period of time.
The Electronic Text Corpus of Sumerian Literature
The size of Noah's boat would have required structural strength of wood; reeds wouldn't have lasted the day.
Genesis says nothing about saving wild animals. Be careful not to read modern ideas into the text. He was to save "all" the animals, and from his point of view, "all" was a very, very small number. He wasn't a National Geo explorer or a zoologist. You can safely interpret that as meaning "all known to Noah".
RE: 39' people: I won't research something that looks, smells and sounds stupid until someone shows me a femur taller than me.