Aussie, I think you're doing a good job. Perhaps you could suggest to your daughter that she could become a teacher. That would satisfy her desire to be around children but would require more education and creativity. It would also pay a lot more.
I remember very clearly being 13 and being a JW. It was becoming very clear to me that my role in life was to be a subservient wife and mother and there was no other path to take, no choices. I remember that I felt that I needed to start looking for a husband. And I didn't want just anybody. And there was no one in our congregation that appealed to me.
It wasn't very long after that that I started questioning the whole JW world. And a year or so down the road I rejected the whole thing.
This is a critical time for both your kids. Just keep doing what you're doing. They are listening. But they're listening to the JWs, too.