https://en.wikipedia.org/wiki/Human_echolocation mentions some training courses, and checking pages on them, they don’t talk about units of years or months, but short ‘workshops’, which usually means that they won’t last more than 3-4 days. So with intense training, it may be learnable quickly.
https://en.wikipedia.org/wiki/Human_echolocation mentions some training courses, and checking pages on them, they don’t talk about units of years or months, but short ‘workshops’, which usually means that they won’t last more than 3-4 days. So with intense training, it may be learnable quickly.