If you just stepped outside of ISS you'll still be in an orbit around earth ( something something first law of motion) it would take you decades to loose enough energy to deorbit and if you survived that long without eating drinking shitting then good luck surviving the reentry.
Do not use any such services online. That will just generate another data point. Instead do it yourself manually. And in future create new email for every service. And use something like fake name generator to get name and email ID.
If you're not going to give her sudo access then I'd say it'll be really hard maybe even impossible to screw up. Also maybe setup a cron job that'll do auto updates and if needed add in a check to make sure it isn't uninstalling anything. Also how about immutable distro.