Are you an Iraqi in Iraq? I am an ex-iraqi but have lived in the Nordics majority of my life. People here don't talk much about the country, but the few tourists that go there go to Erbil and only have good things to say about it.
If you don't mind clutter free, simple presentations, try hack.md or cryptpad. Both supports markdown styled presentations, both are FOSS cloud applications and the format of the presentation is highly portable.
If you want to get really ambitious, try marp framework for presentations - still markdown but on steroids.
Whaaaat, you're having a good experience with teams in Firefox? I've run into all kinds of problems with teams under Firefox in linux, particularly with codecs and not being able to receive video. It works better under edge in linux, but unsurprisingly, the best teams experience is under the native client in Windows.
Some are forced to use windows due to workplace requirements or software only running on windows. I run linux everywhere I can, but don't always have the choice.
Correct me I'd I'm wrong, but with docker you're limited to the filesyatems and the image of the OS you're installing. If you need to experiment with the pre-OS boot events, can that even be accomplished with docker? E.g., trying out different GRUB settings, setting up LUKS with dropbear etc. I think those things require a VM.
I've been using linux on and off for 20 years and docker reignited my interest for running linux. There's plenty of good guides and free courses, if you need help finding one - let me know and I'll send you a YT playlist.
As an ex social worker in Sweden (both as a case officer and treatment assistant), I can attest to the low pay, garbage benefits (if any) and extremely stressful work.
Try zellij. Not as popular as tmux, but very intuitive to use.