I’m a big fan of Fate but I wouldn’t try it with a big group of players who are unfamiliar with it. It’s not a crunchy system but not really rules-light either and needs a very different approach than most traditional games; e.g. if the players aren’t used to self-compels, you’ll have your hands full remembering all the PCs’ aspects and trying to keep them in play so the players regularly get Fate Points.

Vim is actually highly ergonomic; you can do everything with a minimum of keystrokes without moving a hand away to a mouse or touchpad or oven the arrow keys. If that’s worth the time investment to learn it, is a highly subjective question. But I’d say it’s a lot easier than many people think.

GrapheneOS has been working flawlessly for me for years. Highly recommend!