Are 1000 calories too low for a 5'3" woman with 213 pounds?

Hello everyone, I'm a 24 y.o. female on antidepressants and antipsychotics who's trying to lose the weight I gained from binge eating. I don't binge eat as much as I used to, mainly the week before the time of the month. I wanna lose at least 15 kg before summer hits. I already sweat a lot thanks to my meds. I don't exercise but I walk my dog daily but not as much as I used to because it's snowing & my pooch has knee problems.

Please help a girl out.