It is very simple.
You don't need going over the top with that.
The answer is in the choices you make.
Check what you want to wear when you go out.
Open your wardrobe and definitely go for what looks sexiest.
You know the difference between vulgar and sexy, right?
Ask a friend for help and advice if you are unsure.
The trick is to go slightly beyond your comfort zone and get used to it.
Same if you go shopping, choose for what looks sexy rather than practical or comfortable.
Check as well with fashion magazines.
Does that look sexy or gross?