Hi, Snoopie. Welcome to SR!
Congrats on decision to quit drinking.
I used to be a workaholic too, for a long time a glass of wine every other day was enough to reward myself for hard stressful work. On some moment one "holic" started to turn into another one.
Boredom may be an issue here. Planning your everyday routine can be of great help, like scheduling workout after work or whatever keeps you busy and your mind occupied. I also spent hours here reading and posting.
Sobriety involves other changes in lifestyle in addition to quitting drinking, but it's worth it and it's getting better.
Focus on today and take care.
Best wishes to you.