baby clothes - how many?

ivana
so i'm starting to buy clothes for my baby, and i still don't know what to buy for the first month or so. 
first of all, i live in a tropical climate so august, when i'm due, will be crazy hot and humid, but we do have ACs in every room. 
what should i buy? sleeves? no sleeves, short or long sleeves? 
and how many of each?
and which size? i know i shouldn't buy too many things i newborn size, but i still don't get the sizes (here i can choose size 52, 59, 66 and so on).
i you were in my shoes, what would your shopping list have?