I'm sorry to tell you that you can only get your cantonese lyrics of these disney songs without their pronunciation.
As far as I know, Cantonese is one kind of ancient Chinese languages which was born much earlier than Mandanin. And the pronunciation system of Cantonese is more complicated than the one of Mandarin. For example, there are nine pitches in Cantonese, but there are only four pitches in Mandarin. Nowadays, most of Cantonese speakers don't learn their accent or pronunciation by reading on Jyutping or Pinyin. They just practise and adjust their pronunciation from daily dialogues with others.
Considering of the reason above, I suggest you should download the music video for those disney songs and practise more. Practice makes perfect. Wish you good luck.