First, what Anjaq said, one has to let go of the persona that's been constructed and employed for decades. Absolutely. Though easier said than done. Just like any bad habit, it takes work to break it.
Nature abhors a vacuum, and sometimes what's inside may be too repressed or too forgotten to properly emerge on the spot, so I do think it really helps to play (play) with some new patterns. Like with clothes on the rack, you don't know they'll fit until you try them on, and some of the cutest things just don't work.
It also helps to understand what cruft may have accumulated, and to be aware of it. For example, the rhythm of a conversation -- so often we were trained (or permitted) to talk over other people, to zero in on rational points rather than paying attention to emotional impact, to try and "fix" things rather than simply being sympathetic. In women's conversations particularly, often there's so much going on. Conversations have intentions beyond the subject matter. It's a time to bond, to relax, to vent, and mostly to just be heard. So be an active conversationalist. Ask questions. Nod, mm-hmm, yes. Frequently give (more) space to the other woman, don't hog it up for yourself if you're not in crisis. Stay engaged.
This, I think, is far more important than hand gestures. Yes, get out of your own way, but it's not a passive thing at all.