The best first-date outfit is the one you stop thinking about the second you put it on. Comfort reads as confidence more than any single item does.
Match your effort to the venue, a cutout piece like Ava works for a bar or casual dinner date. Save anything more elaborate for date two or three, once you know what you're actually walking into.
Skip whatever you'll be adjusting all night. A neckline you keep tugging or straps you keep resetting pulls your attention away from the person across the table, and that matters more than the outfit does.
Pick one statement, a bold color, a cutout, a silhouette, and let the rest stay simple. You want them remembering you, not cataloging the outfit.