Where the heck is my vag?!

I have a boyfriend who I plan to eventually lose my virginity to when I'm good and ready but beforehand I figured I need to get to know my body first. So I turn on some porn, rub my clit for a bit, try to get as aroused as I can first. Then I try to find my vag and...I feel so stupid because I can't find the opening exactly. I feel what is best described as a tiny clam (soft and made of human flesh of course) blocking my opening. Is that my hymen? I don't use tampons so never had anything been inside my vag before. Gosh I just need...some knowledge. I feel clueless. Help? Before I gotta take a mirror down there, yikes.