12 sq meter studio type apartment, too small ba for one person?

Hello!! Ask ko man po, I am going to rent kase a new room. Studio type siya na room. Wala lang kitchen, may sariling restroom and bed.

I am planning kase na magkaroon ng small refrigerator na Hisense and since walang kitchen, I am planning to buy a microwave oven or electric oven, but part of me is thinking kung healthy sila hahaha I've been overthinking kase since may mga nababasa akong carcinogenic ata if continuous ang gamit. Anyway my question would be the following:

1. Maliit po ba ang 12 sq studio type na room for one person?

2. Ano marerecommend niyo saking healthy way to reheat food if ever walang kitchen ang room?