It took me two years to realize that the JW's were not special. Be patient with yourself. Take baby steps. Missing the convention can be the first step. Then read some good books, take a class, join a club, and build a new life for yourself.
Having a meeting with the elders was the catalyst to my realization that they are just another cult. The elders behaved so arrogantly and aggressively that I could not understand how they could claim to have any connection with God. They did not care about me or my spirituality or well-being in any way.
Your guilt is misplaced. If you need to feel guilt, it would be better to feel guilty about not donating to local food banks, doing volunteer work in the community in such a way that it makes a difference in people's lives, and for not becoming the person you were meant to be instead of being controlled by people who don't give a d*** about you.