Passion grows as you get better at the things you do. You get better at doing those things by spending time deliberately practicing.
You get better and you get more passionate about what you do by focusing on straining yourself physically or cognitively until it is uncomfortable.
As you get more passionate, you will tolerate more of the discomfort of stretching yourself to get better and better. As you get better, your passion will grow.
So which comes first, passion or the practice that you later find out you’re passionate about? That is the difficult question.