Say that you're smart, fun and interesting. Then mention that you're not like other girls and you don't and hookups. Finally, include a catchy quote like "If you can't handle me at my worst then you don't deserve me at my best".
It doesn't really matter. If you have good pictures, you'll be successful. Guys who want hookups and guys open to dating and getting in a relationship will both match and message you. You'll probably be able to tell the difference; it's pretty obvious. If you have some stuff in there about you it's easier for them to start a conversation with you, though. My friend's bio says stuff she likes doing, where she works and goes to school, where she's from, etc.
That's my profile and yeah I think it works for dating.
I start with something like "hey :-) I like your profile what are you doing in "name of city"?" I get dates but no one has looked like their pictures yet. The dates are good when we spent a good amount of time talking but when not it could be a little (lot) awkward haha