Living without a smart phone seems too restrictive to me.
Instead, I live a life free of ads and feeds.
GrapheneOS filled with Open Source apps and all notifications disabled gives you the best of both worlds
The full power of technology when you need it, and no one stealing your attention. You simply use your phone whenever you need it.
When I'm with people in the real world I almost never touch my phone. When by myself I usually just listen to audio books and podcasts while walking.
It's really great. But even listening to something makes your mind busy. It's also great to have some time with only your thoughts getting into your mind. Meditation helps as well, but you also need to have deep thinking as well where you actually take care of those thoughts, basically the opposite of meditating.