I just started my PhD programme in a very wet, cold place. I come from a tropical South Asian country, and this is my first time living in such extreme conditions.
I arrived at my university with a PhD offer, but I am not due to start working until March 2026. These circumstances have created two problems: I have nothing meaningful to do, and I can feel depression and mental health issues settling in. I have been here for the past three months, and I have only seen the sun for about fifteen days. I am constantly feeling depressed, crying (or bawling my eyes out), and eating my feelings.
I am also a practising Muslim, so I am struggling to settle in because there is no Muslim community here. The local community isn't friendly towards international students either, and other international students tend to keep to themselves.
I am considering applying elsewhere for a PhD, but I am unsure if it is the right decision. I worry that if I stay here, I will not produce any worthwhile work. I am also certain that if I take a leave, I will never return. Is it a good idea to switch PhDs, and if so, what should I say when this question arises in interview boards and SOPs? If not, then why not?
My thesis topic is not exactly the same as what I studied during my master's, but it is similar (I studied solar cells, and this is magnetism, related through deposition methods and thin film technology).
Edit: It's North Eastern Japan, right next to the Sea of Japan. (Changed illness to health in the title)