First, it is a good melody but is rarely heard these days. With or without a vocal, it is a great tune to include in a programme.
Next, if you examine its structure - particularly the chord progression - you will find it is very simple, and therefore a good one for learners to master. And it trains you in so much that will be the basis for more difficult tunes as you progress in your studies.
For example, it is a 32-bar tune, with an AABA structure. You will discover that about 80% of all the traditional jazz tunes we play are based on such a structure.
The Middle Eight uses the chord progression:
III7 - III7 - VI7 - VI7 - II7 - II7 - V7 - V7.
It is essential to become fluent in improvising over this progression because dozens of our tunes use it for the Middle Eight (sometimes with very slight variations).
The 'A' sections also use essential, basic chord progressions, all beginning with three bars on the tonic chord (I).
So beginners would do very well to practise improvising over this tune. It is an archetype for so much of the music you will have to learn to play in a traditional jazz band. If you can succeed with this tune, you are launched on your career as a jazzman.