Tl;dr:
Diet
This is the most important factor in fat loss, here are the most important principles and factors:
- Intermittent fasting: fast 4 - 6 hours after waking up, use coffee, water and green tea to make it easier.
- Eat a 20-25% calorie deficit
- Eat healthy single ingredient food
- Get at least 2g of protein per kg of body weight
Exercise
- Limit cardio, lift heavy weight to maintain muscle
- keep an active lifestyle (walking, constant activity, Yoga etc ..)
Hydrate
Drink a lot of water, 5 - 10 liters a day
Sleep
at least 8 hours a day.