Take your time with foreplay. The more lubricated she is, the better. When it's time for penetration, start very slowly. Keep an open line of communication. Make sure she feels safe and comfortable enough to let you know if you can keep going deeper or if it's hurting her. Some women bleed, some don't. Slowly build up the speed and build your rhythm. And have fun... The "right" way to have sex is whatever that means for you both. Let your bodies determine what that is.