[zamazingo]

Apart from the actual set up to include org-capture in it, not much.

Shortcuts to open a file (C-x C-f), close it (C-x k), and closing emacs (C-x C-c) would be the emacs shortcuts you'd need to learn. The rest would be org-mode shortcuts, like setting something as done (C-c C-t d) etc.

You will have to get used to being in Emacs though, that's for sure :)