Not being wet while sex

So I was having sex with a guy... and I’m not really all at good with what to do🤷🏽‍♀️ so we were in his car and we was bout to get it in but he stopped and said “ girl you ain’t wet wet” 😅 so I looked at him and was like “ well what am I supposed to do then” he looked at me all confused and was like “damn you really don’t know what to do huh” idk he wanted me to rub my clit to make myself wet, but I fell so weird doing it, cause I’ve only started having sex 4 months ago and I’m fricken 18 ( then girls be loosing their Vs as a young age 😅) can someone help cause ion really know what to do when having sex to make him happy 😩