any tips?

Hey ladies !! So today my boyfriend kissed me for the first time after we have been dating for about a month and it quickly turned pretty hot and heavy. I don't have a problem letting anyone touch or see my boobs so that wasn't a problem but then he went to finger me and I have never had anyone touch me down there so I was very nervous and asked him not to and he immediately stopped. I was just wondering if anyone has any tips for becoming more comfortable with my own body? I'm honestly very scared of my vagina because I have no clue what's going on and I feel like anything I do to try and explore my own body will be painful; and I really want to let him do things but I'm scared it will hurt or not feel good. Any tips for just nerves in general regarding sex and being intimate with another person. Thank you!!!!!