An unhelpful suggestion would be grow up playing the violin or trombone. However, I think Yair’s suggestion is a good one. I am not confident of developing absolute pitch if you havent mastered relative pitch. Musical examination often have a “aural” session which is all about relative pitch. As a result, there is a lot of teaching aids for learning and practising. A good start with a LOT of online resource is learning to sight-sing (assuming you can already read music). Just google sight-singing.
An unhelpful suggestion would be grow up playing the violin or trombone. However, I think Yair’s suggestion is a good one. I am not confident of developing absolute pitch if you havent mastered relative pitch. Musical examination often have a “aural” session which is all about relative pitch. As a result, there is a lot of teaching aids for learning and practising. A good start with a LOT of online resource is learning to sight-sing (assuming you can already read music). Just google sight-singing.