I think you still have plenty of time to exercise. Stick to it for a month or half a year, and the slimming effect will be very obvious, and the muscles will come out.

But the calorie intake should be moderate. You can estimate that 1400 calories a day is no problem. Staple food must be available, or you won't last long after losing weight. In addition, unbalanced nutrition will lead to other problems in your body. I wish you success!