first date after breakup!

Okay I just recently got out of a two year replationship, I'm just now 18, so I'm pretty young. We lived together the whole relationship. Literally 3 days after being official I moved in. Okay anyway, we just split a week ago, and I have a date tomorrow, my first date in over 3 years because my ex and I never really 'dated'. I need advice and tips on how to be myself really and not completely seem ignorant lol