I understand completely where you're coming from, flower.
If you're going to write a will, you will have to specify that under NO CIRCUMSTANCES do you want him raised as a Jehovah's Witness. You do not have to defend your decision to anyone, and the judge (should you pass on and your son requires guardianship) will respect your wishes. There are non-JW relatives, and you say that their lifestyle is not the kind of environment you'd want for your son either, and that's fair too. I think you're beginning to see the kinds of dilemmas that arise when we xJW adults neglect our own need for friendship and socialization and focus mainly on our children. It's very important for you to get involved in your community, make friends of your own (maybe a single mothers' group?) so you can start building trusting relationships with other people again. I'm fortunate to have a married brother who never became a JW, and he's agreed to be my children's guardian should anything ever happen to my husband and me. My husband also has non-JW relatives who would be glad to do the same.
Personally, I hope someday you'll meet a great guy who treats you like a queen, and will think of your son as his own. This is the kind of person who ideally should have the privilege of raising your son.
Love, Scully