Can adults start learning piano from zero?
Yes. I regularly coach adult beginners and restarters, and we start musical thinking early: practical theory, phrasing, and tone color, not just mechanical note pressing. For example, I coached a nurse in her 40s who began by struggling through early Thompson pieces; in less than two years, she was performing Tchaikovsky's The New Doll and a Schubert Waltz with confident musical expression.