I picked one up as a wall-hanger, worst case...but I'd kinda like to get it working. The DA pull cycles the cylinder, but the firing-pin doesn't come through the breechface. The squeezer doesn't really squeeze, either.

I found some YouTubes on the Iver Johnson, but none for the Smith. I am familiar enough with the modern JKLN series. Is it close enough that I won't get in trouble winging' it?

I'm not that familiar with that model, I'd need to have it in my hands to know much. That said, the Numarich drawing could perhaps help:
Smith & Wesson 32 Safety Hammerless Parts, Schematics | Numrich Gun Parts
I'm sure it's reasonable to carefully remove the sideplate and peer inside.