From a slightly different POV. Figure out what you want to say. In broad terms, think about your own experiences that you might want to expose in lyrics, not necessary to be poetic or rhyming, that can come with time. Melody's can happen by the way words come together naturally. Look at the way the Beatles lyrics told a story.
BIAB is a great tool because you can try so many styles and chords, it's like a lego set for music,just dive in.
Wyndham