I think my vaginal opening is way too small

I'm a 19 year old trans guy. I'm still a virgin and never penetrated anything inside my vagina. When I open it on the mirror, the only thing I can see is a really small, dark opening in the shape of a drop, and a thick membrane at the bottom (which I assume is the perineum, because it's OUT of the entrance and blocks it, doesnt look like any kind of hymen). I do have a hymen but I can't see it due to how small my opening is, which also hides my urethra completely. The hole is barely a centimeter.

I've looked through multiple of those vagina galleries and none look like mine.