Help!

Hi ladies. I’m 17 years old and I’ve never had sex or masterbated. I am scared it will hurt but I’m trying to prepare myself for the first time I have sex. I bought a vibrator, it is small but when I try to put it in lol, it won’t go inside of me. It just makes me so nervous that the first time I have sex it’s gonna hurt. Should I try live to allow the vibrator to go inside of me? Or any tips? I’ve put a finger in before but it didn’t feel good. Thank you!