How can I do better here

So me and my gf had our first sleepover and things started pretty quickly, it’s both of our first time so we started basic making out and then went for foreplay. I was using my finger and she seemed to really enjoy it but she had to guide me constantly, I’ve never done this before and while she said it was amazing I’d like to be able to make her orgasm without her help. What makes this harder is that I did research before hand about fingering but she is much smaller than me (5ft) and said she experienced pain with just one finger, so I was just rubbing the area above her vagina where she told me to and she really liked that but I have no idea what I was doing. I understand that as a beginner it’s normal to not know but I’m completely in the dark here, I’m also unsure as to if we even can have sex because she experienced pain with just my finger. At first I thought maybe she’s not turned on enough but she was really wet down there, but still so tight I would have to force my finger if she wanted it deep. For information tho she’s never put anything in there out of fear, and she’s had no past trauma (that I’m aware about)