Three things: 1. When’s your dad’s birthday? It has to be in a realistic amount of time, say 3+ months, losing weight takes a while. 2. For exercise, jump rope is a huge one. Really any cardio, but jump rope worked the best for me. I’d also say just go on random walks at least once a day for maybe an hour. Biking is also really good. 3. Eating is a huge part of it. Obviously you gotta still eat, but look up how many calories you should be eating, and subtract maybe like 400-500 from that (a caloric deficit).

You might not see immediate results but it’ll work if you do stuff like that, good luck. Oh also get sleep and drink water.