Hi and welcome from a SO. You sound exactly like my partner, somewhere in between. He had been wearing female underwear secretly for a year before I discovered it. He's always had long hair too, so nothing different there. Luckily, I like long hair on guys. He also shaved all his body hair without telling me. I do understand your wife's feelings - I've been there. It's mostly fear. It is all out in the open now, and things are better. My biggest fear too, is that he will go the full monty with total transition but he is convinced he doesn't want that, ever (he's 62 now). The fact that your wife is accepting certain things is a good start, you may be able to move things along slowly as long as you are both open to discussion, but it has to be slow, and with compromise and agreement. In our case, I took my partner shopping, in the women's department, for black jeans, and he bought 3 pairs. No one but us would know they are women's jeans. I bought him a pair of earrings last Christmas as he has both ears pierced now.
I too would advise a therapist for both of you. We have just started with one, and it's already proving to be very useful.
Perhaps your wife would like to post on the Significant Others section of this forum?