Where does the penis actually go? Like I know it goes into the vagina (refer to the diagram) (specifically talking about the vagina not the vulva) but is a penis supposed to fill up the whole thing? Or does it just fill up the bottom of the vagina where the hymen is/used to be? Or does the hymen cover the whole vagina?

Please help, I’m so confused

I thought that the penis goes into the hole where you have your period and give birth? But is that hole the whole vagina? Or is there a smaller hole within the vagina?

Wow I am so confused ! Any comments will help. Please help a girl out !! Xxxx