Hi Im 19 And I Was Trying To Have Sex

hi im 19 and i was trying to have sex with my bf, but i found it to be hard to do. i knew it would be.. the thing is that i couldn't find my hole. but what i did fine was skin!?!1 blocking the my viginia. it look like skin to me. i dont know what is..i know its not my hyman thought. please help!