Ideally work with a coach. Otherwise, look up ressources on how to actually practice this. No, it is not enough to speak English, and no, no one will ever tell you this in your face.
Chinese (and possible other SE Asians) are different almost all other non-native speakers, be it in Asia, Europe or America, in that you have a hard time pronouncing those sounds that make us understand the word.
I have hear presentations by very smart and eloquent Asian speakers, that I just can not understand.
This problem is so large, that I suspect you don't actually hear the difference yourself, much like Westerners will probably never be able to pronounce Mandarin correctly if they don't specifically work on pronounciation (without even being aware).
Again, the main issue is that compared to other non-natives, the way Chinese speakers do this means they
a) Are hard to understand
b) Difficult to listen to
c) Seem incompetent
A French accent may be charming, an Indian accent may sound funny and an Italian accent may flow differently, but a Chinese accent just omits all the critial sounds.
I feel like no one ever talk about this, and I this year I have seen at least two Chinese PhDs, who have good research and live in the US long enough to speak well, but probably lost on the job market because listening to them is a freaking chore!
Learning a language and learning speaking is separate, both are difficult and take a long time, but both need to be focused on.
Please don't make me sit through more of these seminars.
Thank you