I could keep talking about tips and ideas for hours. But let it make it short. Cantonese doesn't have a lot of resources online. People learn by ear. There are some approaches I would recommend. I assume you know some Cantonese. You are only going to perfect it.

I think it is the same for learning any other language. First, get some input. You can watch TVB / Youtube / get a few books. You also need a dictionary app to look up vocab you don't understand. Next, you can try using what you learnt. Every day, try to write something in English, and try translating it to Cantonese. You could also find partners to talk to in a daily basis. You should try using the new vocab and try to make more mistakes. They will correct you. You know English. There are tons of people which want to learn English in return. Give it a search in the Language Partner.

In my opinion, learning a language is just like learning how to drive. You need regular practice daily.

If you are from Hong Kong, you are more than qualified to teach your native tongue. Professional teachers are experts in education. However, in terms of the Cantonese knowledge, you are also a C2 native speaker. You know all the vocab and grammar.

To start with, you might need a good understanding of the Cantonese romanization e.g. nei5 hou2. You can just youtube "jyutping" and learn it in 5 mins. It could take you weeks to be familiar with. Then you can get a book/online resources to follow. Those materials usually start off with greetings, introducing yourself and daily conversations. There shouldn't be anything you can't explain to them.

They are your friends. There is no pressure. It will be fun. Good luck.

I can see some good ones on Amazon.com. I think the more pictures the book has, the better it is for you. I find them easier to follow and more fun when they include comic in the conversations. I don't recommend those pocket phrase books or from the planet which is lonely. They were too wordy and a bit pointless to remember the whole phrase without knowing what it really means word by word. For me, I recommend

Cantonese for Everyone (Jyutping)

Essential Cantonese (Yale)

In my opinion, there are 2 things you can do.

1) talk to the mirror

2) talk to a language partner or an affordable tutor

By talking to yourself, you can practice your toungue. Speaking the new language out loud is incredibly helpful. You need to start off really slow. After 20-30 reps saying the same thing, you will see the difference. This was how I practiced speaking English every day.

It is inevitable to find a real partner/tutor to pinpoint the mistakes you have. This way you can learn in a faster pace. I have tried both. For language partner, it might take 2 hours every time and it might not be productive sometimes. Some people speak the language naturally but don't know why and are not very keen to correct you. I now prefer having a teacher. Learning a language doesn't happen overnight. My advice is to find affordable teachers and let them practice with you every day for 1 hour. It will be very productive.

I have tried a language marathon/sprint from another platform to learn English for 90 days non-stop. It wasn't very good in my opinion because they were group lessons. I now created my own approach. I have 5 English teachers who charge me only $10US/hour (you can adjust whatever affordable for you). My English improvement has been furious because now I can write this long comment and you can understand me so far.

Good luck on your journey.

Let me make it easier for you. I would say

"m4 si3 m4 zi1"

Literally, it means "not try not know".

That means you don't know if you don't try.

This is a common way to encourage people to try something new. e.g. opening a new business, trying a new hobby, or even picking up a girl etc.

同意。應該兩樣都有，要看作者是那裡人。廣州用簡體，香港澳門的都用繁體。在外國的唐人街，兩樣都有。馬來西亞和其他地方我不清楚。我覺得只是習慣的問題。基本上這一代的年青人，繁簡都可以看得明白。

外國人想要學粵語，大部分都用Jyutpingh和yale吧。先學好怎麼說，再學怎麼寫。

Agree. I think both are equally popular. It depends on where the author comes from. For Guangzhou, people use simplified. For Hong Kong and Macau, people use traditional. In most China town in the west, I have been both. I am not sure the preference in Malaysia and other countries. I think it simply depends on which one you are used to. Basically, most young people understand both perfectly these days.

For westerners, I think most of them use the Jyutping and Yale romanization. They can focus on speaking, and then learn how to write later on.