Black hole is a Giant in the universe that can sucks everything in it. Even light cannot pass through it. The fact is black hole has a massive gravity, due to which it influence the space time. There are some contradictions about black hole ie. Space Time Paradox.

if we travel towards black hole the time will automatically change to us but it depends how close we are the black hole.

Once we pass the Event Horizon, we can't escape the gravity of the Black hole.