Ear training gives you the ability to conceptualise what you hear, nothing more. There are countless phone apps, YouTube videos, and social media hustlers, and books promising results in short order. Unless you are in possession of perfect pitch and deep prior experiences listening to music, this will take some time. I am 48 years in. I am still working on it.
Ear Training for Jazz Musicians
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted percussionist and drum teacher.