Do the work
You are a multifaceted being. You have multiple interests and underestimate your own limitations. You believe in your ability to do a million things at once and save the world but in reality, you can only focus on a limited set of things spread over time.
I am learning this later in life. At first, I assumed this meant mutilating my interests in pursuit of one. So I stopped writing and making art to focus on UX Design. I was unhappy. I later learned to find work that aligns all interests to accomplish a few key objectives. This is how to excel at one thing.
Perfectionism creeps in when choosing the one thing. Preparing countless spreadsheets, participating in countless workshops, asking a million questions because that one thing has to be impactful, enjoyable, and others would want to pay you for it.
Ikigai, right?
Forget Ikigai. Do the work. Choose any problem, and start working. Put out a version of the solution. Then iterate violently. As frequently as possible. Only way you can learn about what you want to do is by refining a solution to a problem.
This process diminishes the ego and helps you identify your true calling.