Introvert + date =???!!!

OK I’m having a problem here. One of my very few friends that I talk to officially confessed that they like me. However when I asked her on a date, it was a mind racing spur of the moment. I’m still gonna go through with it, but my isolated head has too many possibilities of this whole thing going badly in the end for me to actually like go and try to enjoy it. As an introvert, I never had this type of problem before am I making a mistake or should I keep going?