Migrating from seam 2 to seam 3 is very painfull process in most cases worth no effort. Firstly you must find someone, who does not know that it is impossible thing and then pray that he will not notice this.
No there is no migration guide yet. The Seam team is working on it.
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.