@carrottopper with your height and build, your BMR is 1600 calories. If you ate this and stayed in bed all day you'd maintain your weight.
I'd not take exercise calories into account, as people have a habit of overestimating how much they burn.
So I'd eat slightly less than 1600 calories, maybe start with 1500 and see how you feel about your hunger levels and if the speed of weight loss is good for you.
My advice is don't go in too hard as you may well end up falling off the wagon and throw it all in.
Eat what you want, but in moderation, weigh foods to get an idea of accurate calories in the food. If it fits into your calorie budget, then great. Obviously, eat plenty of protein and fruit and veg, but don't let yourself feel deprived.
It took a long time to gain the weight, so it's going to take some time to lose it.