*it feels to me like people who succeed in the certain industry had a strong passion for going all-in on learning a certain technical skill, and I'm struggling to find the one I passionate about.
If you haven't read the book, then do yourself a favor and do it. One of the key points is to avoid "Do what you love." Don't build a business in the golf industry just because you love to golf. Go all in on a business that will allow you to golf as much as you want once that business is successful.
You need to find your why, not your what. Why do you want to be an entrepreneur? Let your why drive your passion.