Alright, I've got some questions about Modern Greek, most questions are about comparing it to Ancient Greek.
How similar is it to Ancient Greek? If I learn Modern Greek, will it be easier (At least to a certain extent) to learn Ancient Greek? Are there still declensions here?
And this last question:
How similar is Classical Greek (You know, the one in which the Iliad or Odyssey are written) from Koine?
I would really appreciate it if someone could reply to these questions that have been heavy burdens.
If you already know Modern Greek, then it will definitely be easier to learn Ancient Greek.
Some things have changed but quite a bit of the grammar and vocabulary is still very similar.
Most of the Ancient Greek I know I learned starting from Modern Greek.
For your other question - "Classical Greek" for me is "Attic Greek", while I think the Iliad and Odyssey were written in Homeric Greek, which is even earlier. Attic was the language of Plato and Xenophon, I think.
I don't have good knowledge on the difference between Homeric, Attic, and Koine Greek; my impression is that there is a general simplification as one moves forwards in time, and that Attic and Koine are more similar to each other than Attic is to Homeric, which I have the impression is fairly challening if you only know "Classical Greek" meaning Attic.
Exaclty! Koine Greek is much simpler that Attic Classical Greek, and much much more closer to Modern Greek. Koine texts are intelligible with little effort by modern greek speakers who have a little knowledge of ancient forms of some words. Also, the phonology of Koine Greek is the same as that of Modern greek, with the exception of υ.