ancient greek FTW!

Yeah, i'm a classics geek. but i know ancient and modern greek. Thing is i can't really think of anything to say and typing them is kind of really annoying (you can use the Symbol font, but they have no accents/breathing marks) so let's just leave it at that

Hows big's the leap from Classical greek to modern greek?
If it's just a matter of pronunciation and minor vocab changes I might consider trying modern greek.