I can't seem to ever find my vaginal opening

You don't rub your vaginal opening honey, you rub the clitoris part between the lips, it's like a muscley, fleshy bit, look up what a clitoris is, you will know though oce you find it because you will start to get pleasure from touching it. It's a myth that females get all the pleasure from the vaginal opening and if your still a virgin then you can't get inside the vaginal hole because it's protected by a fleshy skin bit called the hymen, which can be painful once broken through for most females and cause some blood to come from breaking through, but don't go forcefully pushing through it and don't rush into sex with anyone, wait until you find a special someone and your ready.Just focus on the clitoris area first lightly till you get the hang with what pressure you like and what spot is the more pleasurable for you.