HN user
Yes, war cannot be prevented by the gender of its leader.
Business constraints (banking support, cost/benefit), risk and group morality play a far greater role in a countries decision than a single individuals gender.
Dark code theme is one of the most important ones if you spend a lot of time coding. If that's not your thing use gray background.
Filter blue light, use small screens, use arc dark theme, reduce brightness to match daylight time.
Take micro breaks (walk to your mailbox, get coffee, walk the dog, whatever).
Get a few USB disks and try the most popular ones. Don't mess around with virtual machines, a USB disk costs less than 12$ these days. You can start a complete Linux system from USB.
If you need to work immediately: Manjaro XFCE, Ubuntu Mate, Fedora.
If you have a lot of time: Gentoo, Linux From Scratch, Arch, Slackware.