Who can learn vernacular in Haizhu District, Guangzhou?

You can buy this book first. Similar books are sold in many places, whether in regular bookstores or street shops. If the author wants to understand this language from a linguistic perspective, such as pronunciation rules, grammar, etc., a tutorial is necessary. Now that Wikipedia is open, you can also look up the "Cantonese" entry. The explanation is very detailed, both in Chinese and English. (Only after reading it did I realize that Yale University has done very in-depth research on Cantonese, which really puts domestic scholars to shame)

Of course, there is another purpose of buying the book, which is to understand some special idioms, three-character idioms Four-character phrases, such as "One thing cures one thing, glutinous rice cures psyllids", it's really hard to figure out what's going on if you don't know it.

If the poster only wants to deal with it in the short term, just listen more and talk more. In addition to boldly chatting with others in Cantonese, you can also watch Hong Kong TV series and movies. Finally, I recommend you watch the "News Daily Watch" program of Guangzhou News Channel, which is mainly in Cantonese and has subtitles. The author can learn more about Guangzhou's history, culture and people's livelihood through it, which is a good choice.