Offer to help setup the account and show them how to use Mastodon in general.
Also, not necessarily applicable to you but worth keeping in mind: encourage organizations to run Mastodon instances/provide Mastodon hosting for their employees or members in addition to providing email addresses. If an org is providing email to employees or members for business correspondence they could easily provide Mastodon services as well. This enables public discussion with the org in twitter/social media format without a third party controlling the platform.
Who could have possibly known? It's almost as if the <35 demographic showed up to every election every time then policies they support may become a priority. Who could have thunk it?
Write a couple of your own toy services as practice. Write a one-shot that fires at a particular time during boot, a normal service that would run a daemon and a mount service that fires after its dependencies are loaded (like, say, a bind mount that sets up a directory under /run/foo after the backing filesystem is mounted - I do this to make fast ext4 storage available in some parts of the VFS tree while using a btrfs filesystem for everything else.) You can also write file watcher services that fire after changes to a file or directory, I use one of those to mirror /boot/ to /.boot/ on another filesystem so it's captured by my system snapshots.
I'd start by reading the docs so you have some ideas about what services can do, then you'll find uses that you wouldn't have thought of before.
iPod replacement, dedicated smart home device dashboard, dedicated navigation/entertainment system in the car, dedicated UI for something on your home network or weather info or headlines or whatever website you want to check regularly in one place
US "news" is billionaire propaganda designed to push whatever world view best supports their financial interests and/or any bizarre philosophy they've decided is most correct
When I logged in about six weeks after the ownership change my feed included Elon Musk, Andrew Tate and 2-3 other right wing influencers. I follow none of these people, I have zero interest in what they have to say and I find them reprehensible. I deleted my account and haven't used the platform since.
I had to set one of these up for my SO a couple of years ago. I dropped EndeavourOS on it, installed btrbk and configured automatic snapshots on a schedule and before package installation/update in case she managed to bork things by pip installing things into system python.
Fedora would probably work well too if you want a lower maintenance burden. I hesitate to suggest Ubuntu or Debian or their derivatives since you'll probably want to be somewhat current with your Nvidia drivers.
I don't have any Internet connected smart devices in my house and I keep a baseball bat handy in case my printer exhibits threatening behavior. Computers are not to be trusted.
I wrote simple hooks for my package manager to fire system snapshots before I install or update any package. It's a nice safety belt that I've never actually needed to use, but if I do need it it's there.
Finally. Are they actually hiring decent UX folks this time or are they using the people who designed 1980s VCR programming UIs again?