Keegiam is correct. What is available on line is a treasure trove of incredible performances; in print, out of print and historical (never in print). It is also a fantastic and inexpensive way to approach the learning experience in a way that is both very interesting and actually helps in keeping one more open to periods in the music that may not be, AT FIRST, the most accessible or enjoyable.
Jazz, like all serious art forms, has a strong evolutionary element. From a historical or chronological standpoint, artists build on what came before; and for the new listener, having at least some familiarity with the early periods in the music is very helpful. For instance, you are much more likely to understand and appreciate ‘60s (and later) Miles Davis if you are familiar with earlier Miles. Late Coltrane, if you are familiar with ‘50s Coltrane; and ‘50’s Coltrane if you have listened to at least some Dexter Gordon. Etc, etc.
Enjoy the ride!
