You can spend years swirling around in the world of "what" you should do, "what" your purpose is, "what" career is best.
Simon Sinek illustrated very clearly in his most famous TED talk "Start from WHY. People don't buy WHAT you do, they buy WHY you do it."
Ways to think about your "WHY"
It's your North Star. Instead of starting your sentences with "what", start them with "I believe..."
Write down your beliefs that excite you, drive you, fill you with energy. Start from there, then move to the "how" you will do that, and then "what" you can do will appear.