A few thoughts:
- Minimalism is material, and therefore, shallow: it's about de-cluttering possessions and life for focus and increasing tiem
- Every successful minimalist has a mission, vision or long term project (gardening, writing, traveling, working out, etc)
If you don't have a meaningful long term vision, well, that's what you need to find. Minimalism isn't and end - it's a method.
With less stuff and less need for income, the idea is to focus on what you want: if you don't want anything I think there are bigger issues at play (I doubt this is true).
I find watching waves to be a very excellent way to pretend I'm getting wiser, give it a crack.