If you were to fall into a black hole, you would most likely meet a violent end. As you approach the point of no return, known as the event horizon, the gravitational forces would become so intense that they would stretch and compress your body in a process known as spaghettification.
Eventually, you would be crushed to an infinitely small point at the singularity at the center of the black hole, where all the laws of physics break down. It is not known what exactly would happen at the singularity, but it is unlikely that you would survive the journey into a black hole.
So, in short, you would not die instantly upon falling into a black hole, but the process would be quick and brutal.