The whole song took about 30 minutes for me, but I have a process to play songs by ear: first, when you find the root note of the chords, you will know what notes to play, all you need to do from there is to know what inversion to play it. The rhythm is easy once you have it. The chorus took a while. Learn the left hand and right hand separately and then put them together-don’t try and do it on the first shot. The rhythm is takes a bit of time, but once you have it you have it.
Good luck!

PS: There are chords on websites like www.chordie.com