@whatwouldbigfatfannydo - what DOES it mean to be a woman? or be a man? Isn't it kind of... What we feel we are?
If you feel your gender is a woman, congrats, your gender is a female, regardless of your medical sex.
If you feel your gender is a man, congrats, your gender is male, regardless of your medical sex.
If you feel you can't be bothered with gender (like me), congrats, your gender is agender, or genderqueer, or non-binary, or whatever.
Yes, transitioning young before you realise the consequences is a bad idea. Being who you feel you are? Never bad.
Again:
Sex = medical biology that tbh is also society defined (as we've decided penis = male, vagina = female, and get flustered with intersex or anything not XY/XX)
Gender = what you feel (i.e. if you could remove your brain and put it in a robot, I bet that anyone who knows they're female would still KNOW they're female, anyone who knows they're male would still KNOW they're male, and they wouldn't suddenly ID as a robot just because they've lost their sexual organs!)