Hello. It is right that you decide to exercise. But we need to start a little bit at a time. If you're going to work, try walking to the office. Sudden overload can cause headaches and nausea. So try to just walk a lot first. You can rent an office like this https://osdoro.com.sg/serviced-offices/ there guests are provided with tea, coffee, snacks, but if you go on a diet you will have to give up sweets and coffee. Exclude coffee from your diet in the first place, because it very much affects the work of the heart. And after a while you will see the result, the main thing is not to give up classes.