I just realized something

You actually can get to say Alpha Centauri in around an hour. It just seems like it takes 4 years from the perspective of people on Earth. Sweet.

you just have to find a way to accelerate yourself to 99.99999% the speed of light. but at that point the energy you put into it using E=MC^2 turns into mass so it takes even more energy to make you go faster. so your pritty much screwed