Question: Was it mastered recently or when you were young?
Analysis

1. You can answer whether you mastered the instrument recently or when you were young. 2. You can also provide additional context, such as how you learned it, any challenges faced, or the motivation behind learning it.

Synonyms
Try these synonyms instead of repeating the question:
  1. mastered→learned; became proficient in
  2. recently→lately; in recent times
  3. young→childhood; early years