I see 3 things
-It will help if it is part of a social activity. Bring friends along for a group intro session.
-A wetsuit is quickly needed. I think 5-10 knots are the best conditions to begin, since the wind can be felt easily. If it is not really hot, the windchill will cool a lady too fast. I did a regatta last weekend. It was maybe 27C. All guys were in T-Shirts. More than half the women were in full length wetsuits. I was toasting just looking at them.
- I guess most women have no interest for technical stuff until they are proficient with a sport. Make sure you have access to an easy to rig triangular sail. And then wait until they request for more advanced equipment, because it will be harder to rig and trim too.