Everything you're doing is perfect. I was blessed to have a partner like you in a very similar situation. She stood by me the whole time, understood the agony of "male-ing up" to deal with the outside world and immersed herself in articles and research about trans issues. As she became more well-versed in what I was going through, she actually helped me to settle down and accept the road ahead.
Some undercover things that were really important for me, especially since I worked a macho, male-dominated job, were wearing women's underwear (just normal, everyday stuff - not really "lingerie"), finding a clean and not-too-feminine perfume that was sort of a-gender, wearing a cami as an undershirt, body hair control, an anklet, a toe ring.
My partner stood by my side, and although we were engaged she waited until I could legally be married as a woman to her. That was huge as well (although gay marriage is still sort of an up-in-the-air issue). All in all, I see my transition as very successful, mostly because of the beautiful woman that I have by my side. It sounds like you are very similar in many aspects.
<3
