If you’re already ready for penetrative sex but your girlfriend isn’t in any way ready, you have to slow down. If you try to penetrate her when she’s not wet and ready for you, you will hurt her, and you certainly won’t enjoy the sex. Except you don’t care about whether she enjoys it or not, or whether you hurt her or not, you should take the time to pleasure her. If you’ve been patient in the past and learned about her body, you shouldn’t have much trouble locating her pleasure points. If this is your first time with her, don’t sweat it either. You can talk to her throughout the process. The goal is to know what pleases her, so ask her what part of her body makes her tingle. Touch her experimentally, then attend more boldly to the parts that made her writhe and moan. When in doubt about what works for her, you can place more focus on her vagina. That is bound to turn on most women faster than anything else.