1 Find a recording
Or more (4!) and store them in your ear.
2 It’s the melody
The chords can be reharmed so learn the melody on your instrument. Sing it while playing the bass or the chords.
3 Play the chords on the piano
Even a very simple version of the chords.
4 Play, repeat, play
Putting in the Time.
5 Change the key
Like learn everything in C or Am.
6 No score
Reading is not knowing and prevents you to learn the tune.