Tonight, I'll be going on a date w/ a woman for the first time

I'm a twenty-something woman who, despite identifying as straight, has always kind of wondered what it would be like to be with another woman. Ever since admitting this to one of my female friends (who's bi), she's repeatedly suggested that we try dating each other. Last night, I finally thought, 'what the hell?' and agreed to a date for tonight. I admit I'm pretty nervous. Like I said, this is my first time doing something like this and I have no idea what we'll be doing or how physical things might get between us. Please wish me luck! Hopefully, it'll be fun for the both of us.