Speaking as a guy, obviously, I want you to look as hot as possible. But then, I’m a guy who admires sex appeal and is not concerned that it means a girl is a slut.
In this day and age, people, especially women, seem to get all caught up in not wanting to look like a slut or something (whatever that looks like), so you have to dress pretty conservative.
The truth is, though, it doesn’t matter so much what you wear, as how you behave. Only girls care about whether you look like a slut or not, so you aren’t dressing for your date. You’re dressing for other girls. Dress how you want other girls to dress, and you’ll be fine.
Then, through behavior, you tell your date exactly what you want him to really know about you. Don’t worry. Your clothes will be wasted on him. He won’t get the subtleties (unless he’s gay). You have to tell him exactly what you want him to know about you, and no being subtle. He won’t get it. Guys your age have no idea how to read between the lines of what a woman says, whether she says it in words or with her clothes. You must be very specific and clear in what you say if you want a guy to understand you, and even then, he won’t get it most of the time. Sorry. Guys are pretty clueless, when it comes to women.
And of course, the obverse is true. You probably think we think similarly to you, to some degree. Not true. There is no good communication between the sexes. It’s always difficult. Nothing is ever clear.
So, good luck. Have fun. And please don’t worry about clothes. So long as you look nice, you are fine. You’d really have to go naked to get a guy to pay attention to what you are wearing in anything more than a “you look nice” kind of way.