This doesn’t need to be a dramatic origin story—your passion for the job is what’s important, not the circumstances that lead you into it. You might talk about the first product whose UX you found compelling, or a famous designer whose writing you’ve read.
Choosing a career in UX might have been a recommendation from a family member, or a former teacher might have told you you had potential. Whatever the impetus was, just talk about it honestly and focus on the interest and passion for the industry you developed after being introduced to it.
