Psychologically they certainly can, but in terms of physical habits, I don't think so. I think women generally pick up "female habits" and mannerisms from their female peers or family members, quite often consciously. I remember lots of school conversations in which my female peers would discuss ways of walking or acting that were "better" because they viewed them as feminine, and then they would go and do them. They would talk about beauty products and then go and buy them on each others' recommendation. Their process of becoming more feminine as they grew up seemed to me to be very deliberate, calculated and conscious.
Since I did not see myself as one of them, I had no desire to emulate any of their behavior, and so I didn't. I had their hormones, but that did nothing toward making me physically act like them. The psychological effects of estrogens did make me more socially conscious, more self-conscious, more anxious, and slightly more fearful of my safety, but none of that was really much of a match for the male aspect of my psyche which typically always won out over that sort of thing. Such as, I might have been more aware of personal danger, but that didn't stop me going out alone at night all the time, for example. I might have had some latent background sense of fear, but I also had no fear at all.
So... no I think the hormones will take care of the psychological details for you, but you are going to have to learn how to move in a more feminine way, learn female mannerisms and habits, and so on. Which you can pick up from some friendly girl talk, or observation and practice. Girls often do this as they're growing up, trying things out and experimenting with their feminine presentation. Some of them don't go in for the leg-crossing, others do, and lots of other things besides... there's plenty of personal and conscious choice involved in a female's presentation of herself, I think, and as we know as a female, you can have a pretty wide repertoire to choose from and still be considered feminine.
(Leg-crossing thing is pure habit. For a few years in my teens I used to do it because I found it more comfortable than just sitting there with legs together. It was just a matter of doing it enough times it becomes comfortable and natural. These days I almost never do it; it's uncomfortable physically for me to do it for some reason. It didn't take long to adopt other ways of sitting.)
