Faster than light travel is easy - in fiction. Not possible in the real world though. Anyone who claims to have done it is mistaken. For example, some Australians recently claimed to be able to move photons faster than light. What they did was to create an entangled situation, which takes time, then collapse it quickly. This is like covering one of a pair of elephants with a sheet and transporting it to the South Pole, then quickly removing the sheet and, at the same time, covering the second elephant which had been left behind. The effect - an elephant moving to the South Pole - is instantaneous, but it is really slow if you include the set-up time i.e. the journey.
Black holes are sometimes thought of as candidates for travel to other Universes, or to different parts of this one, but each black hole has a characteristic frequency. The frequency is too high for us to survive if the black hole is small, and large black holes would attract so much matter that we would be killed by collisions.