Hello Experts:
I am considering being a living donor. Ultimately, it's going to take more time for me to decide one way or the other. Not what I'm asking about here. But as I've pondered that, I've come up with the questions that won't quite leave my mind

Or maybe it's because I'm trying to wrap my head around why there is such a shortage in the first place.
Wondering if your wonderful folks could assist in getting some of these questions answered.
I know most 'traditional' organ donors are brain dead - often through car accidents. But how long after death can someone's organs be transplanted? Do they really have to be on a ventilator and intubated at the time of death in order for it to work? Or can there be like 30 minutes between death and when they arrive say at the hospital Do they really open someone up right after they've died in order for the organs to remain viable?
Do people who die on the operating table in surgeries often have their organs harvested if the surgery goes awry and they pass during it? Or are the attempts to bring them back so violent to the body that it destroys any chance for viable donation of organs most of the time.
When someone says they want to be an organ donor and then passes prematurely, can their organs almost always be used? Or is there a large degree of chance/randomness in whether it is successful. Like is it common for someone to pass, be opened up, to find some kind of a problem, and then to have the whole thing fail.
Finally, and perhaps the most relevant - for people who do give a kidney, do you have to be careful about some things? For example, not drink too much water at one time, or be more careful about what medications you take than you would be otherwise?
Anyways, sorry for the weirdness. Just the way my mind works.
Thanks again.