Complex sentence: Jesse reads the journal and finds out about Lestat after he was made into a vampire and how he first awoke the ancient vampire Akasha (Aaliyah) with his music.
Split into simpler sentences: Jesse reads the journal and finds out about Lestat after he was made into a vampire. In a flashback to his origins, Lestat recalls how he first awoke the ancient vampire Akasha (Aaliyah) with his music.