I know perfect pitch is not obtainable for adults (I'm over 20.) and I accepted it, okay. I even watched Rick Beato's video about it (youtube.com/watch?v=816VLQNdPMM) and read about it on the internet.
But I wouldn't think that every musician has relative / perfetch pitch since born or childhood.
Is there some way to obtain relative pitch good enough for example to play something from my head (maybe after hitting a reference key) or be a good music composer. (In my opinion, music like the ones in Solaris (2002) or dungeon synth songs like the one in Depressive Silence II or most synthwave songs or Blade Runner soundtrack (even songs from B.R. 2049)).
So, let's say I've got musical ideas, or compositions good enough to create songs like mentioned above or I just have some "sense" of composing, creating good melodies.
Can I train relative pitch what is good enough?
Also, I learn self-taught.