The most important aspect is the order in which you learn it. Starting with the E (.) and T (-), the going to I (..), N (-.) etc.
There are plenty of free morse tutors out there. But if it's for a CAA PPL/IR (there is no JAA one yet if I am right, which is why you are asking?) the be advised that the morse is S----L----OOOOO-----W. At 6 wpm, it's almost a different language.
Note that on that subject, it's important to recognise the letters as sounds not as dots and dashes.
Useful practice is walking around translating car numberplates into morse.