It's certainly my intention for this game to be entertaining and accessible for both musicians and non-musicians alike. You might learn a bit of terminology here and there, but I'm definitely not locking sex scenes or story progression behind in-game music theory quizzes.
As for an update, yes, there is another one coming in a few weeks. Total play time for a first time player starting fresh at v0.6 will be around 8.5-9ish hours, depending on how fast you read. Hope you'll share your thoughts if you decide to give it a go.