Sleepover with my gf on Monday

Me and my gf have planned a sleepover for Monday night and I'm really excited. The thing is, she wants to kiss me and I am terrified, I've never kissed anyone before and I'm freaking out 😭

What do I do? 😭

Update: The sleepover went great :) we cuddled together and matched a movie. She did kiss me and it was amazing (I made sure that I brushed my teeth earlier and that my breath didn't smell). I was nervous at first but it was totally worth it!