Hi
Just a couple of comments, more from observation than direct experience (meaning I didn't use hormones, just PM).
The point is not if you are a straight male, it's more about if you are cis.
Estradiol causes a "more natural" progression in feminisation. Facial changes, muscle loss and breast growth will go hand in hand. For some reason, probably because of ignorance about its actual strength and over usage, it seems that PM causes faster breast growth (and in some individuals buttocks growth) without facial changes or too much muscle loss.
I would suggest that you look into your actual goals. If what you are seeking is a more androgynous figure then pharma is the way. (good luck describing that to your doctor). If you are after specific changes like breast growth in a shorter time and without much else happening, then PM seems to be the answer.
Remember: doctor prescription is always safer than herbs. And I am not a doctor. I just threw there what I saw in the last few years.
Good luck!