Where to go and what to visit in Athens(Greece),sofia(Bulgaria)...?

Even though is a relatively small country it is broad and wide enough not to have "all locations" close together, yet they are not far apart on the mianland. If you want to travel from east to west on the broadest part it is a 8-10 hours journey and from north to deep south about the same with a lot of cities along those routes. Islands are a different story.

Although on a map they look close most do not have connections to each other while the most touristic can be reached by ferry hopping to the next one. All in all geographically are closely located but not always easily accessible. Villages are usually within a few kilometers between them.

No. Greece includes a lot of islands, so you'd need to use a ferry.

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.