* Early Years: Her formal training began at Metro-Goldwyn-Mayer (MGM), where she was signed at the age of 13. At MGM, she received intensive instruction in singing, dancing, and acting.
* Singing: She was trained by Roger Edens, a well-respected composer and vocal coach at MGM, who helped shape her distinctive singing style. She also studied with William B. "Bill" Lee, who trained her in operatic singing.
* Dancing: Garland received rigorous dance training from Ernest Belcher, who focused on stage presence and technique.
* Acting: Her acting was honed through extensive acting classes at MGM, working with renowned directors and coaches.
* Mentorship: Garland's career benefited greatly from the mentorship of Louis B. Mayer, the head of MGM, who saw great potential in her and pushed her to be the best she could be.
It's important to note that her training at MGM was incredibly demanding and often stressful, especially for a young girl. While she gained invaluable skills, the pressure and expectations she faced had a negative impact on her mental health throughout her life.