How can a girl take another girl's virginity?

TMI TMI TMI SORRY

So my girlfriend is a complete virgin. I've had partners in the past, but they were all male. That was before I came out as a lesbian. She's my first girl but she hasn't dated anyone at all. I'm her first. I can't finger her because it hurts her and I've tried using lube and a small dildo nothing seems to work ??? H e l p