Was there any time before time started?

I’ve always been curious about the Big Bang theory and the idea that spacetime began at that point.

But then another question arises: what was there before it started? If something starts, that usually means it did not exist before it came into existence. Is there another timeline within which universes begin and end?

If there is no time outside of spacetime, then perhaps the Universe simply is, like a static picture. In that case, time exists only within spacetime and may be, in some sense, an illusion.

And what happens inside the black hole, from our theories it looks like time ends there, but how time can end, what does it even mean?

Maybe our minds simply cannot comprehend a timeless, multidimensional reality. Or maybe there are multiple dimensions of time.

All of our science seems to break down at this point, and perhaps it can never go beyond it. Maybe rationality itself breaks down there, and something else begins.