My take only, but if all you want is physical attribute...HRT is probably not what you are after. It changes so much more than just one's external self. It sounds like implants would produce the result you are desiring while leaving your body chemistry alone. If you want to keep bulk muscle, HRT will likely provide a disservice to you.
As for my personal development, my entire body has changed over the past year due to HRT. Breast growth from a 36A to 36C and lately an hourglass figure is emerging. Butt and hips have definitely grown, to a point where I understand why women's pants are cut the way they are.
This is the physical stuff...the biggest changes FOR ME are the internal calm and a shift from miserably dysphoric to happy 99% of the time. Sex drive diminished, able to connect with people on a level I did not realize existed and a redefinition of life in general. These are all internal things that may or may not be what you are looking for.
Hopefully I have offered something helpful for you.
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