I’d recommend Power Toys for that. AHK is cool but better for scripts and automations. Power Toys has lots of other neat functions and support by MS.

I found power toys didn't work too well, especially when you want to turn it off and on, or put exceptions for some programs

I just have a simple autohotkey script + vim like keys for going up and down in textboxes/selection/dropdowns.

  <!k::Send {Up}
  <!j::Send {Down}
  Capslock::Esc

Only downside is the mess that happens when on other machines that don't have that, also try to use ^[ as much as possible.

AutoHotKey scripts can be compiled in to portable executables.

For a simpler solution I can recommend https://github.com/randyrants/sharpkeys. Of course AHK is great tool for all kinds of more advanced customizations.