My recommendation is to just try bunch of them and see which one fits your needs or you like using the most.

Try both manual tiling and auto tiling for both X11 and Wayland, one will eventually stick.

I started with AwesomeWM, then tried bunch of other ones , and to my surprise, I found myself using DWM (flexipatch) the most. I’m planning to transition to Hyprland soon.

Just use what you like and don’t pay much attention about the reviews.

Yup, zig was the way to go when I did it too.

If you’re already using keepassxc, you can import OTP codes and use that. That’s what I do when my phone is not around to use aegis. It’s not as pretty, but it works.