When we learn a tonal language, using an instrument would help your sense in mastering it. You can hear yourself sing and play the tones. Relying on charts and tone numbers creates dependency on it. In this video, I put the Cantonese Tones in a scale, so you have tactile ways to grasp the tones. Once mastered, you will have anchor tones to build your vocabulary.
Made some mistakes, there is the video for the corrections: