The article also presents different senses of perfect pitch, and categorizes your sense as being at the lowest threshold (or lower).
I think "My journey of learning perfect pitch over 15 years" is more apt
Learn perfect pitch in 15 years sounds more like a step by step article.
I would have clicked both, just expect something closer to the latter.
The article also presents different senses of perfect pitch, and categorizes your sense as being at the lowest threshold (or lower).