IKR! It is absolutely mind-boggling. I read with amusment articles about the possibility of achieving speed-of-light capabilities. Big deal! They’re going to need a greater magnitude of understanding to even perceive the actual distances involved. The speed of light is not even equivalent to the speed of an ox-drawn cart.
For man, interstellar travel in the future won’t be done with traditional rocket designs crawling at light speed. It will take something a bit more creative.
I don’t sweat the interstellar travel part for humans. It’s not going to happen for a looong time. However, traveling within the Solar System quite possible and has already been accomplished by our unmanned spacecraft.