If you’ve got something you can use as a ‘beater laptop’ that’s a good way to start. Linux can breathe new life into an old computer that still works but can’t handle modern bloat. Once you start using something for light web browsing and word processing you realise how little the OS on your computer makes a difference.

And for switching to Proton you can set up a redirect on your old email address so you still get everything but can operate out of your new Proton account