I think a nice little “you look pretty/handsome/cute/nice etc” is a good start because then the other person can say “thank you you look really nice etc too” i think it’s date etiquette 🤷🏼♀️ idk das just me. Just shows a little interest.
Idk how you can go on a date and not compliment someone ONCE. Isn’t that the immediate thing you’re going to do? 😭