You can't fill that large a void overnight. You have to start small and work you're way into the world.
I tried new things. Things I wanted to do but either didn't have time or was reluctant (not to bring reproach on the bOrg). Some things I tried once or twice and didn't care for, other things became new hobbies. Pursuing those things gave me oppurtunity to meet new people. Over time, I made friends and acquaintances. I'm not a super outgoing person, so the few, but quality, friends I've made have been enough to fill the friendship void.
Travel is another way to get out and experience new things and meet new people. I used this one to help deprogram my wife (inactive but still under some of the mind control). She loves to travel, so I encourage it. Anything to get her exposed to anything not JW related. Over time, she's become more socially active and outgoing in the "world" than I am. I think I created a monster...lol
I also started to read more. I've always like to read, and I like history. So I started reading about history that interested me. I also read biographies of notable people...sometimes people that a good dubbie might not read about. I started with a book written by a guy named Ray Franz...
And movies... I love movies. I've gone back and rediscovered the golden age of Hollywood. I've also gone back and watched all the classic R-rated movies that I missed along the way. I'm a little bit of a movie buff these days, though way behind "normal" people my age who didn't deny themselves all those movies over the years.