I've been using Vim for over 5 years now for as much as possible, and it started exactly like that: I looked at a couple of the most basic shortcuts(Esc and i to switch modes, :w and :q to save and exit, hjkl to move the cursor), just started using it for editing files and looked everything else up when I needed it. Over time the stuff you actually need regularly sticks.

Nothing has influenced my use of computers as much as Vim, and I'm really glad this tool exists. It makes editing text a great experience, and has a couple feature you can't find anywhere else(not even Emacs offers such a flexible, intuitive keybinding functionality or reliable, quirk-free controls).