How do I pursue a creative idea without committing to the whole project?
Test the part of an idea you most need to learn about before you put a big budget behind it. Put a ceiling on what you'll spend and promise, and write down what evidence would justify a next step and what would make you change the idea.

Tyra Banks spoke about taking risks and about ideas that didn't work out as expected. That leaves room for a distinction: pursuing an idea doesn't mean making every commitment at once.
Different doubts need different tests
Maybe the audience understands the concept and doesn't want it. Or maybe the idea is hard to explain before someone experiences it. Those call for different tests.
For an unfamiliar workshop format, you might show the outline to a few intended participants and ask them to explain what they expect to leave with. For a product concept, you might test a simple demonstration without claiming a finished product exists.
AI can help organize questions or compare feedback you're allowed to use. It shouldn't turn polite interest into proof of demand.
When the test ends, record what changed in your understanding. You might come out with a clearer audience or a different format, or you might decide to stop. Each of those tells you more than an untested assumption carried into a bigger commitment.
What to try this week
Find the one question about your idea that matters most, and write down the smallest test that could answer it this week. Note what you'll look for before you run it.