A sure way to know your vocation is to ask: "What problem do I want to help solve in the world?" What matters to you deep down in your bones? What crisis have you seen that, no matter how hard you try, you cannot un-see? What makes you lose sleep at night knowing it persists in the world?
With a little practice, you can rewire your brain and train yourself to be content with what you have, and stop incessantly trying to fill a bottomless bucket with stuff.
At some point, everyone begins to wonder how they will be taken care of in their old age.
At the end of our life, professional accomplishments are a footnote to those who know and love us. Perhaps we should pay attention to that fact, and not wait until later stages of life to prioritize what really matters.
Perhaps time is best compared to the wind. We cannot control where it comes from or where it goes, but we are can harness its power and propel ourselves forward into the life we want most.