People are proud of all sort of things but what has to do with anything ? Do you list all that stuff on your resume ?
Try to stay on topic or don’t bother …
You asked me "what exactly are you proud of?". I was just answering your question, and disputing your implication that I would have no cause to be proud because there is no "accomplishment" (your word).
You didn't ask me "would you list first XXXX on your resume?" That is a different question, with a different answer. The answer is I don't currently list anything like that on my CV, but in the future, if I was the first woman to do something amazing, it would depend on what that thing was.