It’s obviously not representative of the overall Linux experience but I recently realised that messing around on the Linux bits in ChromeOS would be a pretty good way to learn Terminal things, at least for Debian. It’s sandboxed so it doesn’t matter if you screw up and if you do it’s like two or three clicks to start afresh, way simpler than setting up and resetting a standard VM for the inexperienced. It, of course, means using a ChromeOS device but maybe that can be a secondary lesson on having megacorps profit from your data.