There is a great website that I started using years ago with my weight loss journey. It is geared toward tracking your weight and measurements and things as far as weight loss, but I have found it to also be a very handy resource for tracking measurements and weight and energy level and things while on HRT now as well. And an added benefit, is since I have been tracking my weight and measurements on it fairly regularly for 9 years now, I can look at charts that show how my body has changed over that entire period of time. So that is pretty fascinating.
The website is SparkPeople dot Com. You create yourself a profile, and then on the left side of the screen, you click on a little scale, that takes you to a page where you can customize what measurements you want to keep track of, and you can create you own. Like I had to create a chest measurement one myself because it wasn't one of the default options. But I have found it to be incredibly useful for many years now. I keep a soft measuring tape here by my computer, and take all of my measurements and my weight every couple weeks or so.
The cool thing is, since you can run a report that shows all of your historical measurements, you can compare them to each other, and see what measurements correlate with what dates, and how those measurements relate to each other. This Sunday, I will have been on HRT for a month now.