Finding your passion
I think finding passions works similarly to a top-down approach or a funnel in the sense that you should try a variety of things to see which one feels right or sticks.
This can be challenging because many endeavors only become worthwhile or rewarding when a person has developed past a certain threshold, as someone who spends more time with something has a better idea of how much the activity aligns with their values and identity, which contributes to their overall fulfillment in life. But this means that people can get easily discouraged when they've tried a handful of things, and nothing has worked, as they've sunk a bunch of time into it.
But how does someone find their passion as quickly as possible? Well, one, I don't think someone should go in trying to speedrun it because finding their calling, so to speak, takes a very long time (years to even decades). I think rather than going through fields like a checklist, people should simply follow their intuition.
Follow your intuition
More often than not, your intuition is probably right. In the book Blink, The Power of Thinking without Thinking, it explores how many times, your intuition knows much more than your conscious brain does because it is comprised of billions of data points from your past life experiences.
We can use this to narrow down our passions through the gut feeling. Picking something to start doesn't need to have some super deep reason for why you should pursue it, as long as it's something that's interesting to you. In many cases when you do brainstorm the 500 reasons why you should be doing a particular job, you end up in a field where it sounds like the smart thing to do, but you hate your job and your life.
For many of the fields that you may be interested in but don't choose to explore for logistical reasons, you don't have enough context to make that claim yet, so you might as well explore it and then make your conclusion from there.
Fear of exploration
A common fear is people's fear of wasting their time. They're so scared that what they choose may be the wrong choice that they end up doing nothing at all.
But we have to consider all the options:
You pick something to explore; you find out you love it, great.
You pick something to explore, you find out you don't like it. You now know you don't like that thing, so that narrows it down, and on that journey, you most likely got a clue to what another option could be, and you learned extra skills to apply to your next endeavor, great.
You do nothing, so you and your context stay stagnant.
3 is obviously the worst option.
Conclusion
In all, pick something you're curious about. Explore it to the point where you can definitely tell if it's for you or not. And be fearless.