everyone is different but I found out in sobriety that I love to cook and bake for other people! I love to go to the gym too and do a lot of different classes.
Like other people have said in this thread alcohol numbs you so much you forget how great life actually is! I am sure you had some interests and hobbies you gave up when you started drinking heavily. Maybe try to rekindle some of those to start but it is fun to learn something new too. Volunteering is great too ...maybe join a church or some other community thing is another option.