this is probably a dumb thing to ask

Taylor • 24 • mama to miles// 8.10.18 • married • nurse
But... 
I have never really had any "girl" friends before, or close girl friends at least since I was in high school (6+ years ago) and my husbands best friends girlfriend wants us to have a girls day and go get pedicures and shop and stuff. I feel like I am going to be so awkward and uncomfortable..what should I do? Lol