I define Hong Kongese as the dialect that is commonly used amongst Hong Kongers and people residing in Hong Kong. So what is the difference between Hong Kongese and Cantonese? What are the differences between Mandarin Chinese and Cantonese Chinese? Get started with these articles here.
Due to the colonial history of Hong Kong, the official languages there are Chinese and English. Most of the time, you will find many English words embedded in Hong Kongese dialect. Very much like Creole. Learning Hong Kongese might be one of the fastest ways you can learn Cantonese then Chinese if you are already knowledgeable in English. Still confused? No worries. As you keep learning, you will slowly notice the subtly differences between the three. Slightly blind to language rules? Rest assured. Let me spell them out for you. Got a question? Contact me! Always happy to help a keen learner :)!