You have two choices.
Either you're so passionate about something that you're willing to put a lot of time, energy and resources into it and become really good at it.
Or you become so good at it that it somehow also magically turns into a passion.
Those are your two choices.
Well, actually, there's a third one.
Doing it because you enjoy doing it.
Just for the fun of it...
Which might maybe even be the most important one out of all of those three...