The moon is never going to "enter the earths atmosphere". The atmosphere is conventionally treated (for boundary of space purposes) as 100km thick. Actually, almost all of it exists below 20km. The moon, on the other hand, has a diameter of about 3500 km. So with the moon touching the earth, 99% of the moon's diameter will still be outside the atmosphere.

For similar reasons, hitting ocean or dry land is irrelevant. On that scale, the oceans are a damp patch. The oceans are 2-D, but the moon is 3-D and is about 500 times the volume of the oceans. Far from having wet tidal waves, the earth would be covered by moondust to a depth of around 40km, if it was evenly distributed.

You can't get "slowly dropping free fall" either. If it fell from current orbit, it would get here at around 30,000 kilometres/hour. If it was magically lowered to, say, the height of Everest, it would arrive at sea level about 40 seconds later, at around 1400 kilometres/hour. Further, Earth's gravity being about 6 times moon gravity, a large amount of it would arrive as loose rock before the main part. Earth gravity would suck rock off the moon's surface when it got to within about 10,000 km of our surface.

The highest point on earth is about 8km, for a good reason. That is about the maximum extra mass that the crust will support, floating in the magma. So don't think in terms of an impact crater, or of "immediate surroundings" - on this scale, being on Mars would be close enough for me. If you put the moon down light as a feather anywhere on the surface, it would immediately (a) fall through the solid rock and into the magma, by another 1700 km, and (b) flumph out, and flumph up the earth too, until a reasonable round combined body was formed. And that, of course, would displace every tectonic plate, activate every volcano (and then some), dry every ocean, broil every living thing.