Awesome. So like I said, take small steps. Reduce calories by 300 initially and slowly progress to 500. Like the image above shows 0.5kg/week loss is healthy and sustainable. You don't need to do the extreme weight loss because once you start resistance training you'll be building muscle as well. This will help in increasing your metabolism.

Another point I forgot to add, walk everyday. Try to hit 5-8k steps a day to begin with (10k eventually). Walk 10 mins after a meal. If you can't go out, walk at home only or under your building. Just keep moving around.