Where do you live?
If you put your chick on the balcony, PLEASE make sure it's not too hot & that the chick can't fall off the balcony. Make sure not other animals can grab her either.
You can't leave the lid on the box on, it's not enough ventilation for her & it's DARK! Do you have some kind of netting that you can put over the top so she can't get out and nothing can get in? See if you can find a bigger and taller box, if you get more chicks that box maybe too small.
The food that you have, try smashing it into small pieces (about this size * * * )so the chick can eat. OR you can soak it in some water to make a mush. Grit is like tiny small rocks that chicks pick at, it helps them digest their food. You may not have "grit" there so you can also smash some rock up until they are tiny pieces about this size * * *