Hi there Vicky!
Being Transgender is a tough thing to go through and what to do about it can be tough. Especially for someone new to the realization that they might be trans it takes a lot of getting use to and sorting through your feelings.
I think you are looking for concrete signs that flag you as a female and that's where it gets a bit muddy. While these all can be signs of Gender Dysphoria, the biggest sign is how you feel about it and who you are on the inside. The hardest person to come out to for me was defiantly myself and I think other people might share similar experiences.
Just be mindful of how you put yourself in someone else's shoes. No two women or people for that matter are alike. What makes one girl beautiful won't be the same for all women.
I agree with Vicky a gender therapist can be a lifesaver when it comes to sorting out feelings. They are also an invaluable resource and ally when it comes to transitioning. I would defiantly seek one out as most of us can really only speak from experience which varies widely.
Girl, there is only one question I gotta ask.... how does it make you feel to be called girl, miss or ma'am? Does it give off a positive feeling or not? I'm not saying it's a definitive thing just another indicator

Wish You the best!