Time is a word to describe change

Hello everyone. I enjoy learning and changing my perceptions on things I experience in life. One interesting thing I heard was that time was a concept to describe change. Without change then time ceases to exist. This kinda blew my mind. I am excited to be in class and look forward to learning different strategies for relaxation. It can be difficult to take the appropriate time to try them. It is also not instant. I try and have to keep trying since I seem always tense. I get tingly when I try and sometimes a little uncomfortable with getting comfortable. I aim to better this and achieve relaxation.