Poisonous Nightmare Apr 11, 2018
Well drinking alcohol and smoking are not pre-requisites into adulthood. They are just options for those interested and are old enough to buy either. Though it's laws for both are variable when in comes the country you live in.

As for how to adult. Just don't. The only thing that requires being an adult is working. And even then, most adults act like children, so being a adult is pretty much impossible.