I'm very early in a transition too and have run into this. The people I've told all expected that the next time they saw me, it would be like flipping a switch and here's Emily. I had to explain to them that after decades of learning to hide every little thing about myself, when I try to drop those defenses, I actually feel like I'm doing something wrong.
I've been living fulltime at home for about a month now, using my natural mannerisms all the time and the longer I do it, the less taboo it seems. I've started to notice that I no longer have a pure male presentation. It's just the clothes and the pitch of my voice that's my guy mode now. I still use the feminine movements and voice inflections. I went to a support group meeting dressed as Emily and they thought I was FTM.