Mobian has an amd64 image available. If you are looking for a “tablet” tablet experience rather than just desktop gnome with an on screen keyboard then that is going to be your best bet.

In terms of DE I would stay with GTK enviroments because GNOME circle has created a pretty extensive environment of apps that feel native there. Both PHOSH and GNOME mobile offer basically the sane experience so you should try them both and see, which you like more in the details

https://mobian-project.org/

Edit: here is the install guide: https://wiki.debian.org/Mobian/x86

If you’re on Android then you can use Termux (via F-droid) to get ssh capabilities. I think there is also a different iOS app, but I’m no expert on that OS, so I can’t tell you its name. If you have a smart phone then you might have a ssh capable system after all

It’s actually not. It’s open core (a.k.a. 80% open source with its AGPL licenced community edition and proprietary with the enterprise edition that adds a bunch of stuff on top)

I never had a problem with LibreOffice. But I also never encountered a situation at school where “advanced” MS office features where required. So, pure luck, I guess.

That being said, LO is not the only the only office suite for Linux. All of these have better MS Office support than LO:

• OnlyOffice: for the most part web based, but there is also a desktop app that wraps the web app into a local container. Free & open source, integrates with nextcloud.
• SoftMaker Office: Proprietary, paid solution, that advertises with having the best MS compatibility on the market. Based in Germany. Usually €99, currently €70 (or a €30 annual subscription)
• FreeOffice: Free but proprietary. Feature reduced version of SoftMaker Office (Comparison)
• WPS Office: Free but proprietary. Chinese, I had some problems with it when I last tried it to install years ago. Maybe they fixed them since, IDK