Beste Eser started taking private music lessons at the age of 5. In 2017, she got admitted to the Piano Department at Izmir Dokuz Eylul University State Conservatory in the fifth grade. She has been studying with Talia Özlem Baltacılar Bayoğlu since the fourth grade.

In 2022, Eser took part in the May 19th "Youngsters, The Stage Is Yours!" event at the Ahmet Adnan Saygun Art Center. In 2023, she won first place in her first competition, IV. International Adana Rhapsodi Piano Competition. In the same year, she won the soloist auditions of her school's orchestra and won the right to perform at the school concert.