It's a nice start :) I'm not sure about a few things, though:

I don't agree that gender is an expression of one's self, or that it is a spectrum. I think gender refers to the norms that are imposed on us on the basis of our actual or perceived sex. It varies in different cultural contexts, but it's not a spectrum. The way we respond to gender norms is quite possibly unique, and a spectrum, but we shouldn't conceal the fact that the norms are imposed and policed from without, in a way that systematically disadvantages women compared to men.

Trans women don't become women, they become trans women. They also aren't assigned male at birth, they are male. Only people with ambiguously sexed bodies are assigned at birth, and I don't know if they can be trans, really. Like if a genuinely androgynous intersex person (not a clearly male person with a DSD) is assigned male at birth but says they're a woman as an adult, maybe they're just a woman, not a trans woman?

Also, not all TRA think gender is an expression, some treat it as an innate essence. Not all of them think sex is real, some say it's a social construct. Not all of them think that masculine behaviour makes you male; see posts to the effect that you're also 'valid' as a trans woman if you aren't feminine and don't transition, and discussions of 'gatekeeping' around who gets to count as trans.

Next step: different views on who gets to compete in women's sports, have conditional or unconditional access to women's spaces, whether 'gender identity' should be in the law as a protected characteristic, and who feminism is 'for'. :)

Also, 'gender critical' will do just fine.