Is all about try n error. Whatever works for me might not works for you. All ive stated earlier works well for me.

Limit your eating time window say 15 to 30 minutes>> how about ur calories? do u eat less than 1000 calories daily bcos the eating window is so short
Calories between 800 to 1k. Plan ahead. (Half vege quater protein quater god fats) in smaller plate (Everyday for the pass 5 months) usually 15 minutes maybe less im done.

Limit daily max 800ml or drink when ure thirsty only. >> but not this. i drink almost 3L daily. i think better to drink more bcos if u drink less, ur body will retain the water and u have more water weight. No?
Maybe to you but for me 800ml or less its my daily water i consumed for the pass 6 months.

Result from 84kg dropped to 62kg today in 5 months time.

Maybe what you can do try to extend for fasting hours 48 or 72 mixed it with dry fasting as well.

But since youre 53kg    no worries lah aiyo. What's your height btw ?

Just take it easy. Stress and no sleaping quality also can cause insulin to be trigged hence will kick you out from fat buring state. To start fat buring mode min 16 hours of fasting minumum.

What's your Break Fast eating pattern ? Fast food ? Rice ? Do you replace your rice with vegetable ? I suggest you look into Complex Carbs instead.