Who you were is a reference, not a cage.

Your history is useful evidence. It tells you what you have enjoyed, what you are good at, how you behave when you are tired and hungry. It is not a contract. People get stuck because they treat an old description of themselves as a rule about the future, then keep acting it out to stay consistent.

Pick one label you have carried for years: the shy one, the lazy one, the funny one. Do something this week that the label says you do not do, and notice that nothing enforces it except habit.