I never studied physics much in depth in when I was in school, but I've read a lot on the subject over the years. Relativity is fascinating in ways that my mind can't fully comprehend.
For instance, since space and time are intertwined, if you could somehow catch a ride on a photon of light and travel at light speed, you could travel the length of the universe and it would seem instantaneous to you, but to an observer on Earth billions of years would have passed.
Time and distances aren't fixed quantities but can vary based on motion. Weird yet fascinating stuff.