Well, that is a part of getting it figured out.
Have you checked out all the support groups in your community? We hooked up with a secular group, because, though we are Christians (Orthodox/Catholic mixed marriage) the many Fundamentalist support groups are a problem for both of us.
Be confident in your ability to teach your child, and do not be afraid to ally with non-Christians who also are doing the best thing for their kids. There is a common ground. I predict you will make friends, and get a chance to share your faith, at some point.
My boys play with pagans. The pagans we have met do not seek to convert us, nor do we seek to convert them. Rather, we agree on the basics of correct child nurturing. The faith matters then can happen naturally and in good time, as friendship and trust is developed
We have gounded the boys (ten and twelve) in the Christian faith, and they are well able to handle excursions into the "real world".