Been in your (similar) shoes mate. My ex was still JW when I woke up and left. I found the best solution was not to mention or talk about religion or god at all and just be the cool dad. Birthdays, Christmas, whatever. No kid is gonna actively choose the boring JW way of life when given the option of the real world.
As for meeting attendance, there's little you can do when she's with her mum. But encourage the kid to keep asking questions.
BTW, here's a link to the JW Lawyers manual that they use to make the non-JW parent appear to be intolerant and incompentant. https://faithleaks.org/wiki/documents/9/95/Cc-E-1988.pdf
The book makes my blood boil.