31! First, be glad that you are still young. Sure, you already missed on some education and many years. But you still have plenty of time in front of you and a world of opportunity.
First and foremost, you need to rebuilt your belief system. This may take time, however, you need to do it. You need to stop, think about things you find acceptable and not and be convinced in the reasons why. For instance, I personally do not believe in the bible, a personal God, etc. However, I do believe in being a good person. For that reason, I would not, for instance, cheat on my wife, steal, lie, etc.
Second, you need to do things other than work. Previously, if you were committed to the JW values, you spent at least 15 hours per week doing things related to that. that is 60 hours per month. What will you do with all this time? For instance, I took some extra work, I took karate courses, I did small projects around the house, took other courses pertaining to my hobbies, increased my activities with my kids. You'd be amazed of everything you can discover. Once you have accomplished a few things you never could have found the time to do as a JW, believe me, you will feel truly free!
As for family... well, there is nothing harder than to loose your family. In that regard, I would advise listening exactly what the society says about non believer spouses: Win them by your actions.
You can send them emails giving them updates on your life, leaving out JW related things. Send them pictures, etc. They will certainly read it. They may not answer to these, but you can be sure they will read it.
You need to come the the understanding that your relationship with your family has been forced into an abusive one by the religion you were all involved in. Abuse is never a positive thing. You should not accept abuse from anyone. When you accept Abuse (lack of respect) from parents, family, friends, boss, girlfriend, etc, you will loose respect for yourself. It is than that you will automatically fail and loose happiness.
BTW: I was also in my 30s when I left.