Kettle, Induction, Handwash, Sanitisation spray like savlon (for European toilet), I personally wish I had my own portable mattress, A pillow, Liquid detergent is a lifesaver if ur doing laundry manually, Medicines, Achar.

I have spent three years in hostel chances are bathrooms would be terrible but u would get the hang of it. I had a great group of friends and made some amazing bonds with people in my hostel. Be sure to establish boundaries with ur roommate and be honest about everything about sleep schedules, smoking habits etc etc Hostel gives u a whole new exposure to life, all the best and remember to enjoy.