"Passion" requires research, such as looking at what others are doing, talking to others, and finding a way to reach out to all the possibilities that are available.

I like to call this the "River Strategy". When water flows through the land, it goes off and branches out to whatever space is available. A river reaches any gap possible and fills it out. Similarly, considering pursuing your interest requires exploring all avenues.

Even if a river hits an obstacle, such as an area of land that blocks it, eventually the river finds a way. It will either erode the land away over time, or choose to flow somewhere else.

By using the "River Strategy", you keep an open mind by exploring the different ways you can learn how to make something feasible.

Even if you hit obstacles, you look for other ways to reach your goals, delving deeper to learn and obtain more information.

Turning something into a reality isn't about brooding thoughts in your head in a dark room until it fills with light. It requires going out into the world and doing research.

Now let's talk about the alternative method of finding what you want to do: trial and error.