This question is very quickly approaching the point where one might as well ask "what would it take for you to stop using electricity?" Yes you can do it, yes some people do it, yes most of humanity lived without it, but to go without it one must abandon modern life.

To answer your question, I would need to become like the Amish: not only willing to forgo the internet but also be around a lot of people similarly willing to forgo it. Otherwise you're just externalizing your dependency on the internet: pretending it doesn't exist but in reality depending on people who still use it. Which even the Amish do to an extent with electricity.

Edit: also consider the very real possibility that we're part of the very last generation that would even be able let alone willing to live life without the internet, since we spent a significant portion of our lives without access to it. The generations after us cannot say that.