Any tips for my first date tonight?

So ... I'm going on a first date tonight with someone new that I met online. We've been texting each other back and forth for about a week, and I think he's a really nice guy. Tonight, though, we'll be going out to dinner. Any tips on what I should say/do tonight? He told me he likes masculine guys, and I'm a bit fem to be honest. I have the "gay voice"/"accent." Am I doomed already? Lol