If you have very recently retired, you can say I've worked.
Of course there is a logical flaw in saying "I'm retired now and I worked all my life." Your life is continuing; your work is not. Additionally, you probably didn't do much real work until you were at least in your teens or perhaps older. However, people will still say this, to refer to the era when they did work, to mean they worked hard.
Student or Learner