learn ancient greek

I am trying to master the script and memorize the letters and what they sound like; I’ve been looking for a pronunciation guide to this end, but it is ANCIENT greek, so more than likely I won’t be taking any trips back in time to any places that speak this language, but it is important that the speech element of it be there for me (I’m an auditory learner). The punctuation marks and diacritical marks are a new one on me, but I’m sure after a few billion hours spent hunched over my desk, I will have totally pwned and H4×0r3D ancient Greek.

I wish to learn Ancient Greek well enough to translate texts and keep a journal in the language; also write metrical poetry in the language. I don’t care to keep notes in English anymore.