You use int 0x13 to load in the required number of sectors and jump to the location you have place the new code. There is nothing you need to do in the second stage, but you will want to make sure that you set DS to be valid for wherever you load the code.
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.