First, watch this video where she explains EXACTLY what the hymen is and how “popping your cherry” is a grossly inaccurate description.
Second, I want you to get a handheld mirror. Go into the bathroom or somewhere private, get naked from the waist down, prop one leg up, use the mirror, and LOOK AT YOURSELF. That’s the only way you’re going to be able to learn firsthand what you look like down there and where everything is. You should be able to see everything clearly.
Just look, explore, touch yourself, and you’ll be an expert in no time. You can even sit on your bed, spread your legs, and use the mirror to look at yourself while you masturbate! If you don’t have a handheld mirror, pick up a cheap one from ANY drugstore.
Go easy with penetration too. Start off using your fingers first before jumping to a vibrator. You need to let your body adjust slowly to that kind of intrusion otherwise it’s just not going to feel good. Take it slow and prepare your body for it.