How to dress when you don’t have curves?

How can I dress to feel confident?

I don’t have curves, but I keep hearing “embrace your curves” GIIRL what curves?

I have nice long legs but a flat butt, and flat boobs. I also have a wider waste and broad shoulders. Athletic looking but I’m not in shape lol. I know that dressing sexy and confident isn’t about showing off your boobs and butt but it kinda of seems like it is?

What if you don’t have very womanly features? I’m unsure how to femininely dress my body because I’m so flat and straight.

How do you dress a body without curves? Maybe someone can direct me to someone who knows?