A discarded Windows laptop is ideal for use with Linux. That's what this Managing Director of an IT company has been doing for over a decade. My desktop PC is a customer cast off from a good five years ago. I slapped in an ageing Nvidia el cheapo card to get two monitors running. My laptop is a cast off from one of my employees - I simply opened it up and moved my M.2 card into it.

I do run ESET on my Linux gear to show solidarity and to show that Linux really is rather more resource friendly than Windows. I login to AD and I use Evolution with Kerb to access Exchange for email. I have the same "drive mappings" to the same file servers too and so on and so forth.

I used to teach word processing, spreadsheeting and databases n that for UK govt funded courses, I've written a Finite Capacity planner for a factory in Excel (note the lack of In-). I still find people who have no idea how decimal tab stops work or how to efficiently use styles. I can confidently inform you that Libre Office is just as good as MSO. They both have their ... issues but both work pretty well.

Kids are easy. Adults are a pain! KDE has a lot of educational games ready to go out of the box.