Before joining "Riverdale," Petsch appears in short films, commercials, and independent projects, gaining experience in on-camera work. She also participates in acting workshops and online training programs, building foundational skills in both dramatic and contemporary material. Petsch studies acting techniques, including scene work and character development, which prepare her for recurring television roles.

Petsch works on projects across different genres prior to "Riverdale," including teen drama, short films, web series, and guest appearances on television. These roles give her exposure to different directors, ensemble casts, and production styles, helping her develop a practical and versatile acting background. She also gains experience with both scripted and improvisational material, enhancing her adaptability on set.

Outside of acting, Petsch is involved in fitness, enjoys outdoor activities, and engages in creative endeavors such as photography, fashion projects, and music collaborations. She also participates in workshops and industry-related events that expand her skills and professional network.