Is there any dua, where I can ask Allah to finish my debts?

Most don't tbh. Statistics have revealed that 31% of British Muslims believed that leaving the Muslim religion should be punishable by death. But most will have some sort of emotional breakdown if they knew and will seriously start obsessing over you as to why you left.

Others tend to never ever speak to you again and will hate you for the rest of their lives.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.