The Strange Effects of Time Inside the Event Horizon of a Black Hole

I've been wanting to talk to a theoretical physicist forever. I'm really curious about black holes. So tell me what you think about this. When a star collapses past the neutron stage into a singularity, are they all the same singularity? No. Well, I mean, you can link up them somewhere, but no, we don't. What if I'm saying we don't know, I would say no, then different singularities. And there are strange effects of time inside the event horizon of a black hole from the perspective of an observer. If you could see someone descending into it, how long would it take them to arrive at the surface? Is that forever? Not