There has been alot of excellent advice offered here so far. I agree that you need to be very well informed about the JW religion. One of the earmarks of the JW's is to "love bomb" new ones to show how special they are and to show how much more loving the Jw's are over other religions. This will end once you accept their religion and then you will be expected to STRICTLY adhere to the rules that the JW's lay out for their members.
If you do not get involved with the religion, it will put a strain on your marriage. I can guarantee that your husband will insist that your child (and future children) be raised as JW's and everything that goes with that...no holidays, abstain from any patriotic displays including flag salute, no blood transfusions if they become seriously ill (up to and including letting them die instead of receiving a transfusion), view all other religions as evil, teach your children that everyone but JW's will be destroyed by God at Armageddon (including YOU if you don't accept the religion!)...these are just a few of the things you will be faced with. That is not to say that "JW mixed marriages" can't work, but they are generally very difficult...especially when a direct conflict with the religion comes up.
Good luck in your decision...get as knowledgeable about the religion as you possibly can. I wish you well in whatever you ultimately choose!