I have a question which is about death. I know that God Almighty has fixed everyone's age for death to arrive to one of them. I wonder if for example I'm 18 years old and I’m very healthy person without being poisoned nor shot and plus I’m young, but simply I have to die at age of 21, can I make Supplication to God To Make my death not to be at age of 21 but to be at age of 200, to have more time to enjoy my life and youth, and to do more preparations and to do things I haven't do?
Oh, and is there any Dua that will change the date of death? And a Dua or something to say or something to do, so that my youth will be increased? Because, I’d like at age of 60 or 70 to look young in biological point. Because, it’s yak to look old man, I don’t like to look like an old man. I want to have a strong energy and I want to be also a strong person, and do things like: visiting places I never visited, performing more prayers and so on, in such that will make me be sure that I will be rewarded in my grave. Because right now, this is the beginning where I just started somehow to follow the teachings of Quran and prophet Muhammad and God, and if I were to die at age of 19, then I’ll be scared even 1h before death.
My question is: if I can make this Supplication to God which I have mentioned in text? And if: yes, then what are the supplications as I mentioned here on text? You can add also something from Quran.