My transition time was quick. I embraced TTATT and made a quick exit in a matter of less than 9 months, and one of the first things I did was resign as an elder to help the transition.
My path was not the one all can/will follow, but it really made many things easier to just face up to difficult discussions and get outta there.
I went through a tiny bit of turmoil about embracing worldly stuff that JW's are so against. In the end, I enjoy birthdays and gift exchange at Christmas, and don't mind lip service to anything else. I just like the idea that JW's hate something like wearing green on St. Patrick or a movie with ghosts or smurgfs in it.
As far as coworkers, as soon as someone noticed the changevin me, I came clean and got everyone's support at work. Turned out great.