I'm planning to stock up baby disposable diapers. Any idea how many should I get and its sizes

I am almost 29 weeks pregnant and have bought a pack of 90 diapers with Merries brand. How many diapers ideally should I get? I only have petpet, Huggies Ultra, Drypers Wee Wee Dry, genki, and mamypoko pants available in my country - brunei and I need to go to Malaysia to get the Japanese (example Goo.N) or better options like Drypers Touch. Still can't find Pampers brand. My friend advised to get made in Japan ones but when I went to find, Goo.N is sold out for newborn and S.