It's instructive that you are unsure.
I'm not unsure. The only way to 'live as a woman' is to be born a biological female and survive until adulthood. It's a state of being, not doing, acting, or dressing.
Essentially each woman is free to make her own choices of how to live. Some women adhere to the stereotypes, others like me don't.
Adhering or not adhering to stereotypes does not make you a woman, or not a woman. Though of course without stereotypes there would be no such thing as transgender. Because what are you transitioning to other than stereotypes associated with the opposite sex?
The problem comes when there are people who go around criticising other people because they think that others should comply with their own expectations of how others should live, often caused by some irrational fear or another.
It's actually transgender ideology that is based on irrationality. For example the irrational idea that men can be women or that how you look, dress, or act, has anything to do with what sex you are.
You haven't answered the question at all. There are 80 billion individuals on earth, each living how they wish. The claim is that you can 'live as a woman', ie in a way that is in some way different from how men live and a unique experience shared only by women. What are these 'woman' things that transwomen can also share, but other men can't?
Being a transwoman is a uniquely male experience. No man has a frame of reference for what being a woman is like other than stereotypes.