Want to loose fat badly! Is impossible.

Hello doctor, I am a physically disabled boy and I am around 100kgs though height (5'10)does not matter in my case because I am always on wheel chair. I had plenty issues which no where relate to my physical disability. But I thought I should mention them as well few years back I had a cyst in my brain. Though it's dead now and after a long treatment of around 5-6 years I am fine now. Those days were miserable because having fits in while being on wheelchair or washroom and unable to speak was sick. But still I am perfectly fine now. But those medicines did plenty of other things like I had to take around 500mg of calcium daily and plenty more mgs I helped in gianing weight. So now I need to shed it badly. I've read quite a few answers or loosing weight through diet. But when someone write we need fibres carbs and all it goes over my head. I need a proper diet with less calorie intake so that my body burns it own fat. Physical work out is impossible .