If you're inexperienced, here's some things I've learned that chicks like over the years.
One, kiss softly and slowly the first time. No tongue. Just run your lips over hers. Suck on them very lightly as things progress. Let the tip of your tongue hit her lips (not the inside of her mouth). Explore her lips with your lips. Let this go on a while. Move your mouth to her cheek, her neck, her ear. But be gentle the whole time. Be subtle. Embrace what you are and let it empower you: an inexperienced guy getting to know her lips and body.
Second, when you're ready, let things get silent. Make sure you're alone. Look at her a little longer than usual. Then, and I personally believe this is important, you should touch her face. Put your hand on the side of her face, neck, cheek, ear area. Then lean in and get it done. Wait 2 seconds at most before the lean.
Three, do not under any circumstances ask for permission to kiss. Just do it. If you're wrong, you're wrong. Just say, if it gets totally awkward and she rejects you, maybe we should just call it a night.