The speaker asks someone to dance again, and admits right away that they don't know the steps. That honesty sets the tone: this is a person who is nervous but willing, ready to "give everything" just to be close to the other person, even in the rain. The line "I keep wondering what's next" hints at doubt, as if the speaker loves the moment but can't tell where the relationship is heading.
In the second stanza the focus moves to the other person, lit by colored lights. The speaker says the light "reveals the truth," which suggests that under the glow the speaker sees something real about them, or about how they feel. The beloved keeps "shining" even under the "thunder / Of the neon blues," a mix of loud, stormy and glowing images. The mood is dreamy and a little melancholy: romantic and hopeful, but tinged with uncertainty, like a night out where the music is bright and the future is unclear.