Vipassanā meditation is the method to realise nibbāna.
You are fortunate in Malaysia, as you have many able teachers such as U Aggacitta
or U Sujiva
. (I am sure there are many others too, but I met them both in Burma when I was there in 1979-1980).
In Buddhism, what you eat is not very important, but what you think is crucial. Whatever you eat, do it mindfully and without greed or aversion.