The world of diet culture is fixated on "quick fix" but it's just not the reality of life.
I always say reduce your intake by 15% in the first instance and then wait for the plateau and then reduce again by 15%. And so on. I wouldn't advise anyone cut to 1200 immediately.
Now some people may find they can gradually reduce down to 1200 or 1500 based on their lifestyle and own metabolism.
But most women will find by the time they've reduced to about 1800 a day they are at a healthy weight and maintaining, especially with more movement and excercise in their life.
Carb cutting for women without a insulin resistance I wouldn't recommend. Low GI eating habits can be great for some women, but you aren't cutting carbs you are still eating sweet potatoes and brown rice on this index.
Also smashing out 7 cardio sessions a week, is not sustainable. I'd aim for gradual increase in excercise. Start twice a week, get moving, then up to 3. Or start by simply walking 15-20 minutes an evening and build up to maybe a jog 3 times a week. And a weekend walk.
Balance. Gradual, long term.
But most importantly enjoyable. Don't become a slave to the diet culture. Enjoy your life, find that balance of what works for you as a individual. 2 gym classes a week and 1800 calories great, or 5 gym sessions a week and 2000 calories. Great.
It needs to be a realistic lifestyle change of eat less move more. Not eat drastically reduced amounts and move excessively, you'll burn out. And not starve and get fed up.
Be kind to yourself, slow and steady wins the race.