I made a contract with my master in which everything is described what I want to do and stuff he wanted. If you know them then just make a contract together. If you have no ideas about the contract there are plenty on the internet.
And most of all enjoy it.
I don't know a lot about SM but I do know subs use *safe* words if they are not happy about doing something or if they feel things are going too far. You should make these people agree to this before entering into this situation, if they don't stick to the safe words then if things go to far it is abuse.
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.