Bolshoi Confidential

Not sure if this is the right fit?

Consider Ballet Shoes by Noel Streatfeild. Recommended by 2 sources.

“Warm, gently paced children's fiction that follows three adopted sisters as they train for the stage while the family improvises care and income. Best value is its clear-eyed portrait of childhood ambition and ensemble rivalries, with concrete theatrical detail that charms readers who like backstage glimpses. Main limitation is uneven pacing and occasional period-bound attitudes; long stretches of domestic logistics and authorial moralizing can feel slow to modern readers seeking a tighter plot or sharper psychological depth.”