My "void" to use that term, wasn't one that could be filled with doing activities or hobbies. I did plenty of stuff when drinking. I had to fill the void with the things alcohol took away. Compassion, gratitude, humility. I had a spiritual void.
I had to learn to embrace the things I used alcohol for...or at least learn that whatever I was hiding from couldn't kill me--shame, discomfort, remorse, and guilt about my moral failings.
I guess I could have gone to the gym or taken a class. But neither was a recovery plan that would keep me sober.