New sink install, weird drain.

[rusty quoin]

4. I'm not plumber, but I've done quite a bit of it,

even working with plumbers...learning more things.

If I have this straight, when you fill the sink with water, there are 3 holes at the drain allowing water to flow through, and if that is the case, the drain is improperly installed.

Uninstall it...the longer you wait the stronger the silicone will set up. If the holes are felt on the bottom of the basin rather than inside, you might not have to move the drain. And back off the nut on the bottom, dry fit it and make sure there are no obstructions. And then tighten it.

You call yourself an old lady, and it might be a strength with tightening thing, and it's not easy besides that. Get it snug, put water in the basin and tighten until water no longer leaks through..once it stops, give it a bit more tightening.

I hope it works.