Hi everyone~
Maybe you have learnt Cantonese for sometime, but still got confused by some pronunciations, eg
你 nei5 Vs 李 lei5
講 gong2 vs 趕 gon2 ?
Just found a website (in chinese though) which may help you:
https://www.polyu.edu.hk/cbs/pronunciation/project/initiation
there are exercises to help you differentiate the sounds :-D enjoy~