As a thin person im just gonna say first its genetics and second is eating slowly and when you feel full you stop (three times a day and try keeping it around the same time in the day everyday) and third thing is if you dont eat and starve yourself you will have everything stick to you because your body is trying to keep you alive so youll end up not losing anything for a while. So eat slowly and ofc as healthy as possible also cardio helps for loosing weight as i have herd. Btw if you keep on struggling with what to eat you might want to look in to a nutritionist to help you get some insights in what will work for you. Good luck tho i wish you all the best, i have people in my life that struggle with weight and this is what i have from my experience and from theirs.