Can’t find my vagina!

So I’m 19 years old and I cannot find my hole. I’ve looked in a mirror and I’ve spread my lips apart and I can’t see my vagina or my urethra. I’ve never put a tampon in simply because I can’t find my hole and I started my period when I was 13, I’ve never fingered myself and I’m a virgin so nothing has gone up there before. Im also an innie and my lips don’t stick out. I’m actually really worrying, it’s not that I don’t want to put a tampon in, it’s that I simply don’t know where it is and the amount of times I’ve had to miss out going to the pool or beach because of this. Please help! xx