I have a date tonight!!! My crush actually said yes!

I asked my coworker out and if he didn’t want to it’s okay. I wasn’t expecting him to say yes. Being realistic. He actually said “Sure, why not.” I have a date tonight and I’m very excited!! I’ve had a crush on him since I started working there in January. I’m also nervous! What do I do?! I haven’t been in a date in a year. A lot of people said it won’t work out if we started dating since we work in the same place and it will end bad. Well we don’t know that for sure. If is pretty hard to look feminine since I’m a large, tall young woman (6ft) with broad shoulders and a curvy figure. I’m overweight. Anyways what do I do? We’re going to dinner at 7pm and he’s picking me up.