My wife asked me that question when I first left, she was still supposedly a Jw, I said "As usual you are jumping the gun, first prove it is the truth, then I will worry about "what next"". (That sounds a bit smart ass, but she always crosses bridges before they are even built, so the "As usual" was true and fair)
She was unable to support the religion in any way, and therefore left as well.
We have found it was not the truth, in any way, and what came next was a journey to a wonderful place of freedom and spiritual fulfillment.