It's absolutely wonderful that you've done this. So, so many times I read of our sisters doing the opposite.
You've been around here enough to know, but just remember that you've had most of your life to learn, research, adapt, seek deeper understanding, experiment, and adjust to your reality of being a crossdresser. She's trying very hard to catch up. It will take time. Possible lots of time. The important thing is she's trying, and you're being absolutely honest with her.