How to get the joy back in life?

Everyone knows being sober isn’t as “fun” as waking up and getting that first high. Or midday or afternoon or after work or whatever. I got 4 days clean using SR-17018. In those days, I was drinking pretty heavily as ever since I started the kratom journey, it’s always felt like the missing piece to life. How do I change that? What helps everyone? Lifestyle changes? Going out?