Dating advice from a girl omg this is going to be exciting for you all woot.
First dates are awkward. Very awkward. Rather than asking a girl for a one-on-one first date from the very beginning, invite her to join you as well as a group of friends. Include some other girls in that group so she doesn't think you're gonna rape her or something. Even better, tell her she can bring along a friend or two of her own. I wouldn't go over a group of five people, though. Make it more of a comfortable, friendly setting more than a date. Walk around a mall or something, or visit a park. If you live in a safe neighborhood then it's okay to just walk around town, too. Include the whole group in your conversations, but if you specifically want to hear her thoughts then feel free to ask her with something along the lines of "What do you think?" if you find that she isn't actively including herself on her own.
Go on a few more outings along those lines, and only after you're fairly certain that she will be comfortable in your presence, ask her out on a one-on-one date. A simple "Hey, Sally, I was hoping to see [insert movie title here], and was wondering if you would want to see it with me?" will suffice. Worst-case scenario: she's seen it already, in which case ask her if there's a movie she would want to see. Agree with her, even if it's a movie you feel you will be bored with. ABSOLUTE worst-case scenario: she says no. This is not as bad as it could be, because at this point you can say your other friends are coming, too, so it won't be awkward, and maybe she'll change her mind. Then you run home and call up your friends and be all like "omg emergency come with me to this movie."
ON THE SUBJECT OF DINNER & A MOVIE: "Dinner & a movie" is not the best date idea. You can't speak to each other during the movie, which might lead to awkward silences. A better option is "Movie & a dinner," so that you see the movie beforehand, then have the entirety of the dinner to talk about it, so you have at least that bit of common ground to hold a conversation about. Of course, the guy pays for the meal (the movie tickets too if he's a real gentlemen), but if she offers, split it in a way that you will be paying for the majority.
When you take her home, walk her to her door if you feel it's necessary. If not, (but you probably want to walk her to the door anyway), drop her off in front of her house, but don't drive away until you see that she is safely inside. This is common courtesy, and goes for picking up & dropping off friends of either gender.
If she asks how you became such a gentlemen, you can say "Some geeky girl on the Internet told me."
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