Just my two cents worth

It may seem silly but long hair enhances what is in my heart and it helps me to fend off the desire to transition on a day to day basis.
If you cut your hair it needs to be on your terms. I get a little ribbing from my wife (who has short hair) about the length of my hair but there is no intense dislike on her part.

You might give your wife a choice of keeping your hair long or cutting your hair and starting hormones.

Johanna