The two fish should be fine togither, I have two dwarf gourami in a tank slightly bigger than yours. As for the amount of time you keep your fish in the quarantine tank, I usually kept them for about a week before moving to the display tank, and lastly, no, you don't need gravel, it is mostly just to make your tank look good.
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.