"SO proof" distro

Any recommendations for a linux distro that i can set up and be reasonably sure my non techy SO won't break accidentally? The set up doesn't have to be easy it just has to not break once I leave her alone with it. My first thought was popOS.

My plan is to have 2 profiles and not give her access to sudo. I just don't want to have to go into it unless she needs a new program.