Hi Jeepthing:
We are another hsing family. It has been a wonderful experience and our kids have turned out with great social skills, high academics, time to develop many other skills, and close family bonds. We make it a point to get them out in the community and not to isolate them from their peers. So we do lots of different sports, art, music lessons etc.
There are literally thousands of curriculums available, just do a google search. There are also many different hs philosophies of education, again do a search. Different approaches work for different families. We have mixed in an unstructured approach, a unit study approach, a textbook based approach with a classical approach!
Does it have to be a JW-friendly curriculum? There are many wonderful Christian curriculums out there as well as secular. The beauty of hsing is that you can tailor it to your interests, your kids style of learning, etc. Often in March, local hs associations have conferences with curriculum halls where you can have a look at what is out there. If you have a chance to go, I would highly recommend it. There are usually interesting seminars too.