Using an Older Chromebook as a Distraction Free Laptop

[iKokomo]

I know that distraction-free laptops are popular these days and I can see how they can be helpful. The only problem is they are super expensive, especially for what they do!

My question is, how hard is it to make one using an older Chromebook (not getting updates) or an older Chromebook with a Linux distro on it?

Thanks!