No, not at the end of your working life, when you finally retire from that incessant doing, from earning a living, and take more time for yourself. Retire now, in everyday life.
Let the mind retire.
Let your attention step back from the thought occupying your mind. Become aware of what is already there, before the thought caught hold. Maybe it is an emotion, a feeling, sensations in the body, your breath, sounds around you. Whatever is already there, but passed unnoticed. It doesn't matter what it is. Different things become apparent at different times.
Then retire again. Let the attention step back to become aware of what is already there, beneath the sensations and feelings. Again, there is no right answer. It is the process itself that is valuable. Just pause and notice whatever is always there.
And then, retire again.