Has the pronunciation changed in the more recent recordings? I've noticed since the last site upgrade that the recordings sound more nasally and monotone. Is this intentional? I feel like your older recordings (e.g. Acts) had more variation in your pitch, but recently they sound more nasally. My guess was that this was to make it sound closer to modern Greek, though I haven't heard enough modern Greek to be able to tell.
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It is not easy to develop fluency in Koine Greek as a student or a teacher, but it is fun! One thing you can do, however, to make it easier, is to connect with other students and teachers doing the same. Feel free to make connections and discuss all matters of Koine Greek as a living language here!