I know there are some youtube videos out there for this because I've talked to multiple people who believed they were useful.
I'm going to assume that you prioritize the integrity of your vocal cords maybe a bit lower than your social presentation right now, so I'll say that I was able to modify my voice before hormones. I didn't do anything dramatic or that would attract attention, I just stopped using the higher voice I had gotten used to using when trying to be a woman. It took practice but made a big difference.