Just go in for a kiss, put your bottom lip under her bottom lip; kiss then pull away. The difference from other kisses is that you pull away so soon but if you want to be more intimate do the same just keep kissing and tilt your head to the other side every once and a while. You don't have to tongue to do that but if you just want to peck she might get mixed signals.... Haha but she also might understand especially since this sounds like a first timer!