You're question is badly worded, but sure, in theory humans could reach black holes.
No known person has been through a black hole. The nearest known stable (stellar mass) black hole is too far away for us to reach with our current technology, and an encounter with one would almost certainly be fatal.
No non-fiction person has ever gone into a black hole.
No, we don't know of any black holes close enough to get to.
For a non-rotating black hole, a person (or a building, or a planet) would be pulverized and crushed into the singularity (point of infinite density) at the center of the black hole. However, the acceleration of particles is so great that a small black hole might cease to exist by the time the atoms actually reach the center, due to time dilation.
Nobody has ever visited a black hole. The nearest known black hole is many light years away. Much to far away for us to reach it.
No.
No
Technically, you can't "see" a black hole, since no light can escape from it, therefore the light cannot reach your eyes.
yes, when you fall near to the black hole due to it's immense gravity you will be spaghettified and you will die before you reach the singularity
No person has ever gone to a black hole. Black holes are extremely dense and have gravitational forces so strong that nothing, not even light, can escape them. It is physically impossible for a human to survive a journey to a black hole.
depending on the size, stellar black hole , yes. Supermassive black holes, no, once you reach the singulaity you are outside of the universe, and you vanish, forever, you don't exist anymore.
If you enter a black hole, no matter what the speed, you will be sucked into the center of the black hole, and utterly destroyed.