Welcome, do the leg work in your own research into the org and its background and beliefs.
If its the TRUTH then it should stand up to reasonable scrutiny shouldn't it? That applies to both sides btw, apostates and the WTBTS. Dont just believe something because you read it somwhere or you see it in print or hear it. Test and challenge.
It takes time and can become a bit engrossing, but gets you where you need to go. Read the bible, compare different translations, you may be suprised that the WTBTS gloss just peels away from doing just that one thing.
Your guilt is based on the negative and guilt ridden message of the WTBTS that has been drummed into you since childhood, it is quite normal to have those programmed responses. Read Combatting Cult Mind Control by steve hassan for some clarity on the mind control. Read Ray Franz Crisis of Conscience on the real deal with the organization.
Even then you may swing back to guilt and negativity and then happiness and freedom and then back again, it normal and a process that may take some time.
I wish you the best in your journey. You are very lucky hubby is on message with you at the moment btw.
Cheers