Start at the beginning, learn the first five letters A to E. learn it as “dits and dahs” (so A is dit dah, not just dot dash). Doesn’t take long to learn them, then practise decoding every car number plate you see in front of you, when you can do the first five then learn the next five, practise them and then practise all ten. Then learn the next five etc.
40 years ago before my flying career started I was taught morse to 25 words per minute by professionals, and that’s how we were taught it. As has been pointed out years ago in this thread you don’t need it for exams any more, but anyone who might ever fly IFR in a non EFIS aircraft with no autopilot should be able to aurally identify navaids whilst flying on instruments, and that’s a lot harder if you have to
look away from your instrument scan to read the dots and dashes on the chart.