Actually, it's not difficult. You can go to the prop store to buy a rowing machine or pedal machine (it seems that it is not sold on Sunday). You can learn something in the first half, such as losing weight, taking a part-time job, buying a CD and listening to it every day. Sometimes you can buy tickets to go to the gym, but the first half is mainly based on the fitness equipment at home. If you can't lose weight, you may get tired. Make sure he stays on or below the green. You can buy some desserts at your own expense, and you can learn later if you lose 45KG.

I hope it helps you.