Just dress however you feel comfortable at that time.
I had intended to dress in a more femme manner of attire when I first met my therapist & "hormone doc" but just couldn't feel right in anything I tried.
So I attired myself comfortably, and I'm really glad I did.
I was asked about feminine clothing, and I said I wear such things insofar as I like the way they look & feel on me, which I hope to increase over time.