Hi, Jeanette! It takes time. As Dena says, lots and lots of time. It is not so much waiting for HRT to do it's magic, as it is waiting for our primitive image recognition networks in our brain to catch up with reality. Those pesky networks take a long time to update themselves.
I've been on HRT 9 months now, and am told that my face definitely has changed. I really don't see the difference yet when I look in the mirror without my war paint in place. That old preoptic cortex still classifies the reflection as "he/him/ourself", and it can be hard to get past that.
Amusingly enough, once I get my makeup with contouring, and my hair all in place, the classification changes. Then, I see Mom in the mirror. No, really. My face is remarkably similar to my mother's, and after seeing her for decades, that is what the image recognition network pops out as a result. I was startled and then sort of amused the first time this happened. My conscious perception now, when I see myself properly made up, is more like "Oh, THERE I am!" now, as I slowly integrate this new self-image.
And yes, when I do recognize that woman in the mirror as myself, there is a definite, preceptable drop in anxiety and stress.
I'm hoping that with time and FFS, the old associations will just fade away and I will recognize Michelle at even the most primitive levels of my brain. But, it takes time.