A dvanced studies will focus on the JAZZ format. However, good jazz musicians have Classical training in their background.
Jazz is a shared learning experience.
No person learns the art of Jazz without playing along with other Jazz musicians. One learning tool for doing this is to play along with recordings of other Jazz musicians. There are courses of studies that use recorded jazz groups leaving out one instrument. This one instrument might be a piano part, bass part, trumpet part, etc. Then, it is up to you and your instrument to fill-in the missing part.